Famous American Scientists Of The 20th Century

The 20th century America was one of the major hubs of scientific and technological developments in the world. In the early part of the century, many prominent European scientists including Hans Bethe, Albert Einstein, Enrico Fermi, Leó Szilárd, Edward Teller, and Felix Bloch migrated to the United States where they accomplished several important achievements. During this era, scientists in the US made one highly controversial yet commendable accomplishment—the harnessing of nuclear energy. Gerald Woodrow Johnson, William Howard Arnold, and Charles Kincaid Bockelman were some of the established nuclear scientists of 20th century. America was also a pioneer in computer technology and information technology. Pioneers like John McCarthy who was one of the founders of the discipline of artificial intelligence played a major role in accelerating America’s progress in the area of computer science. Grace Brewster Murray Hopper, born in the early 20th century, was one of the first programmers of the Harvard Mark I computer. Americans have led the world in physics as well with the likes of Alan Harvey Guth, Steven Weinberg, and Sam Bard Treiman making important contributions to the field. Read on to learn more about the life and works of famous American scientists of the 20th century.

This ranking is based on an algorithm that combines various factors, including the votes of our users and search trends on the internet.

Vote for Your Favourite American Scientists Of The 20th Century

 1 
Albert Einstein
(Developer of Theory of Relativity)

Albert Einstein
62
Birthdate: March 14, 1879
Sun Sign: Pisces
Birthplace: Ulm, Germany
Died: April 18, 1955
Deemed as the most influential physicist of the 20th century, the German-born physicist Albert Einstein was one of the greatest minds to have ever lived. Even his name is now synonymous with the term genius. The father of Modern Physics is credited with developing the theory of relativity and explaining the photoelectric effect. The latter won him the Nobel Prize.

 2 
Neil deGrasse Tyson
(Astrophysicist)

Neil deGrasse Tyson
42
Birthdate: October 5, 1958
Sun Sign: Libra
Birthplace: Manhattan, New York, United States

Public Welfare Medal-winning astrophysicist and academic Neil deGrasse Tyson hosted shows such as NOVA ScienceNow, Cosmos: A Spacetime Odyssey, and Star Talk. He is the director of Hayden Planetarium and contributed to the dismissal of Pluto’s status as the ninth planet. He has also written a monthly column as "Merlin.”

 3 
Carl Sagan
(Astronomer, Astrophysicist)

Carl Sagan
30
Birthdate: November 9, 1934
Sun Sign: Scorpio
Birthplace: Brooklyn, New York, United States
Died: December 20, 1996
Pulitzer- and Emmy-winning astrophysicist and author Carl Sagan was best known for co-writing the TV series Cosmos: A Personal Voyage. His novel Contact was adapted into a film. He was known for his extensive research on extra-terrestrial life, had taught at major universities, and written countless papers and science books.
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 4 
Richard Feynman
(Physicist)

Richard Feynman
21
Birthdate: May 11, 1918
Sun Sign: Taurus
Birthplace: New York, New York, United States
Died: February 15, 1988

Theoretical physicist Richard Feynman won the Nobel Prize in Physics in 1965, along with Julian Schwinger and Shin'ichirō Tomonaga, for his research on quantum electrodynamics. He also contributed to the development of the atomic bomb. Feyman made it to Physics World’s list of the 10 greatest physicists of all time.

 5 
Steve Wozniak
(Co-Founder of Apple Inc.)

Steve Wozniak
9
Birthdate: August 11, 1950
Sun Sign: Leo
Birthplace: San Jose, California, United States

Widely recognized as one of the two important pioneers of the personal computer revolution, Steve Wozniak is credited with co-founding Apple Inc. along with Steve Jobs. Not surprisingly, he has been described as one of the men that changed the course of history through technology. Apart from being a programmer and technology entrepreneur, Steve Wozniak is also a well-known philanthropist.

 6 
J. Robert Oppenheimer
(Theoretical physicist)

J. Robert Oppenheimer
17
Birthdate: April 22, 1904
Sun Sign: Taurus
Birthplace: New York, New York, United States
Died: February 18, 1967

Hailed as a brilliant scientific mind, American physicist J Robert Oppenheimer, led the Manhattan Project which resulted in the development of atomic bomb during the World War II. The bombs were dropped on the Japanese cities of Hiroshima and Nagasaki in 1945. However, Oppenheimer was in a constant conflict over the moral issue of the weapons of mass destruction and rallied against nuclear proliferation.

 7 
George Washington Carver
(Agricultural scientist)

George Washington Carver
32
Birthdate: April 22, 1904, 1864
Sun Sign: Capricorn
Birthplace: Diamond, Missouri, United States
Died: January 5, 1943
Agricultural scientist George Washington Carver is best remembered for promoting crops that were alternative to cotton, such as peanuts and sweet potatoes. He invented ways to prevent soil depletion and developed scores of products made from peanuts, including paints and cosmetics. He won numerous honors, such as the Spingarn Medal.
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 8 
John Forbes Nash Jr.
(Mathematician)

John Forbes Nash Jr.
22
Birthdate: June 13, 1928
Sun Sign: Gemini
Birthplace: Bluefield, West Virginia, United States
Died: May 23, 2015
The inspiration behind the movie A Beautiful Mind, John F. Nash was a legendary mathematician whose work in the area of game theory earned him the Nobel Memorial Prize in Economic Sciences. In his later years, he was riddled with mental illness. He later died in a car crash.

 9 
John von Neumann
(Great Mathematician Who Were Equally at Home in Pure and Applied Mathematics)

John von Neumann
11
Birthdate: December 28, 1903
Sun Sign: Capricorn
Birthplace: Budapest, Hungary
Died: February 8, 1957
Hungarian-American scientist John von Neumann contributed to the development of game theory and the concept of self-replication. His work covered vast areas including math, economics, physics, and computer science. His research on nuclear physics led him to be part of the advisory committee of the U.S. Atomic Energy Commission.

 10 
Subrahmanyan Chandrasekhar
(Astrophysicist Known for his 'Theoritical Studies of the Physical processes of importance to the Structure and Evolution of the Stars')

Subrahmanyan Chandrasekhar
14
Birthdate: October 19, 1910
Sun Sign: Libra
Birthplace: Lahore, Pakistan
Died: August 21, 1995

Remembered for his varied contribution to astrophysics, Subrahmanyan Chandrasekhar is perhaps best known for his work on the evolution of massive stars. Today known as Chandrasekhar limit, it contributed to final understanding of supernovas, neutron stars, and black holes. A prolific writer, he also did significant work on energy transfer by radiation in stellar atmospheres and convection on solar surface.

 11 
Claude Shannon
(Known as a "Father of Information Theory")

Claude Shannon
5
Birthdate: April 30, 1916
Sun Sign: Taurus
Birthplace: Petoskey, Michigan, United States
Died: February 24, 2001

Claude Shannon was an electrical engineer, mathematician, and cryptographer. He is credited with publishing the article A Mathematical Theory of Communication which gave rise to the field of information theory. Hence, Shannon is considered the father of information theory. He is also credited with founding digital circuit design theory. During World War II, he contributed to the field of cryptanalysis.

 12 
Rachel Carson
(Marine biologist)

Rachel Carson
4
Birthdate: May 27, 1907
Sun Sign: Gemini
Birthplace: Springdale
Died: April 14, 1964

Rachel Carson was a conservationist, marine biologist, and author. She is credited with authoring an influential book titled Silent Spring, which played a significant role in advancing the global environmental movement. Carson is also remembered for her book, The Sea Around Us, which earned her a U.S. National Book Award. She was posthumously honored with the Presidential Medal of Freedom.

 13 
Kurt Gödel
(Logician, Mathematician, Philosopher)

Kurt Gödel
9
Birthdate: April 28, 1906
Sun Sign: Taurus
Birthplace: Brno, Czech Republic
Died: January 14, 1978

Hailed as one of the greatest logicians since Aristotle, Kurt Gödel was Austrian-born American mathematician, logician, and philosopher, who earned international stardom for his incompleteness theorem. Also credited with developing a technique called Gödel numbering, he later started working on Mathematical Platonism, a philosophical theory that failed to attract wide acceptance.

 14 
Linus Pauling
(Chemist, Biochemist)

Linus Pauling
8
Birthdate: February 28, 1901
Sun Sign: Pisces
Birthplace: Portland, Oregon, United States
Died: August 19, 1994

Only person to win two unshared Nobel Prizes, Linus Carl Pauling was an American theoretical physical chemist, who received the 1954 Nobel Prize in Chemistry for his work on nature of chemical bond and 1962 Nobel Prize for Peace for his efforts to stop nuclear weapon testing. Also a prolific writer and educator, he has published 1,200 books and papers.  

 15 
Grace Hopper
(Computer Scientist)

Grace Hopper
21
Birthdate: December 9, 1906
Sun Sign: Sagittarius
Birthplace: New York, New York, United States
Died: January 1, 1992
Computer scientist and U.S. Navy rear admiral Grace Hopper was one of the first programmers of the Harvard Mark I computing system. She pioneered the machine-independent programming language technique, and the FLOW-MATIC language used by her was later used to create COBOL. She received a posthumous Presidential Medal of Freedom.

 16 
Vint Cerf
(Computer scientist)

Vint Cerf
7
Birthdate: June 23, 1943
Sun Sign: Cancer
Birthplace: New Haven, Connecticut, United States

 17 
E. O. Wilson
(Biologist)

E. O. Wilson
7
Birthdate: June 10, 1929
Sun Sign: Gemini
Birthplace: Birmingham, Alabama, U.S.
Died: December 26, 2021

E. O. Wilson is an American naturalist, biologist, and writer. An influential biologist, Wilson has earned several nicknames, such as The Darwin of the 21st century. He has also been referred to as the father of biodiversity and the father of sociobiology. In 1995, he was ranked among the most influential American personalities by Time magazine.

 18 
Nikola Tesla
(Inventor, Engineer & Futurist, Who Obtained Over 300 Patents)

Nikola Tesla
27
Birthdate: July 10, 1856
Sun Sign: Cancer
Birthplace: Smiljan, Croatia
Died: January 7, 1943

Inventor, engineer and futurist, Nikola Tesla, is best remembered for his contribution to the development of the modern alternating current (AC) electricity supply system. A prolific inventor, he had around 300 patents for his inventions. Even though he earned a considerable amount of money, he had poor money management skills and died a poor man.

 19 
Andrew Wiles
(Mathematician, University teacher)

Andrew Wiles
22
Birthdate: April 11, 1953
Sun Sign: Aries
Birthplace: Cambridge

English mathematician Sir Andrew John Wiles, a Royal Society Research Professor at the University of Oxford, is best known for proving the modularity theorem for semistable elliptic curves, thereby proving Fermat's Last Theorem for which he was awarded the Abel Prize and the Copley Medal by the Royal Society. He also proved the main conjecture of Iwasawa theory.

 20 
Benoit Mandelbrot
(Mathematician and polymath)

Benoit Mandelbrot
20
Birthdate: November 20, 1924
Sun Sign: Scorpio
Birthplace: Warsaw, Poland
Died: October 14, 2010

Noted mathematician and polymath, Benoit B. Mandelbrot is perhaps best known for his work on fractal. He not only coined the term, but also used computer-constructed images to illustrate the mathematical definition. Also credited with the discovery of Mandelbrot set and Mandelbrot law, he established that even those things which were apparently chaotic or rough had a "degree of order".

 21 
Katherine Johnson
(Mathematician)

Katherine Johnson
36
Birthdate: August 26, 1918
Sun Sign: Virgo
Birthplace: White Sulphur Springs, West Virginia, United States
Died: February 24, 2020
Katherine Johnson was a physicist and mathematician, remembered as the first African-American female NASA scientist. Her calculations helped launch the space missions of Alan Shepard and John Glenn. She was crucial to the Apollo program and won a Congressional Gold Medal and a Presidential Medal of Freedom for her achievements.

 22 
Terri Irwin
(Naturalist Who is The Owner of Australia Zoo in 'Beerwah, Queensland')

Terri Irwin
6
Birthdate: July 20, 1964
Sun Sign: Cancer
Birthplace: Eugene, Oregon, United States

American–Australian naturalist Terri Irwin is best known as the co-host of The Crocodile Hunter, along with her husband, the late animal expert Steve Irwin. She has also been part of shows such as Croc Files and Crikey! It's the Irwins, and helped in the development of Australia Zoo.

 23 
Wernher Von Braun
(One of the Greatest Rocket Developers and Space Exploration in the 20th Century)

Wernher Von Braun
4
Birthdate: March 23, 1912
Sun Sign: Aries
Birthplace: Wyrzysk, Poland
Died: June 16, 1977

German-born American aerospace engineer and space architect, Wernher Von Braun, worked in Nazi Germany's rocket development program as a young man. After World War II, he moved to the United States where he became a pioneer of rocket and space technology in the nation. In his later career, he became director of the newly formed Marshall Space Flight Center.

 24 
Bennet Omalu
(Pathologist, Neuropathologist)

Bennet Omalu
4
Birthdate: September 30, 1968
Sun Sign: Libra
Birthplace: Idemili South, Nigeria

Nigerian-American physician, forensic-pathologist and neuropathologist Bennet Omalu is most-noted for discovering chronic traumatic encephalopathy (CTE) in American football players. He was serving at Allegheny County coroner's office in Pittsburgh at that time. He presently serves as President and Medical Director of Bennet Omalu Pathology, chief medical examiner for San Joaquin County, and as professor at the University of California, Davis.

 25 
Jonas Salk
(Medical researcher)

Jonas Salk
5
Birthdate: October 28, 1914
Sun Sign: Scorpio
Birthplace: New York City, New York, United States
Died: June 23, 1995

If the world is successful in its fight against polio, the credit goes to American virologist Jonas Salk who developed a vaccine for the disease. Described as a “miracle worker”, his concerns for humanity were reflected in the fact that he did not claim a patent for the vaccine. He founded the Salk Institute for Biological Studies, based in California.

 26 
Ken Thompson
(Computer Scientist)

Ken Thompson
15
Birthdate: February 4, 1943
Sun Sign: Aquarius
Birthplace: New Orleans, Louisiana, United States

 27 

Lynn Margulis
7
Birthdate: March 5, 1938
Sun Sign: Pisces
Birthplace: Chicago
Died: November 22, 2011

Lynn Margulis was an evolutionary theorist, biologist, educator, and science author. She was a modern proponent of the significance of symbiosis in evolution. Along with British chemist James Lovelock, Margulis was the co-developer of the Gaia hypothesis. She was a strong critic of neo-Darwinism. In 2001, she was honored with the Golden Plate Award of the American Academy of Achievement. 

 28 
Mary Jackson
(Mathematician)

Mary Jackson
8
Birthdate: April 9, 1921
Sun Sign: Aries
Birthplace: Hampton, Virginia, United States
Died: February 11, 2005

American mathematician and aerospace engineer Mary Jackson went down in history as the first African-American woman to work as a NASA engineer. Initially a math teacher, she later joined NACA under Dorothy Vaughan and contributed to countless American space programs at a time when racial segregation was the norm.

 29 
Vera Rubin
(Astronomer)

Vera Rubin
5
Birthdate: July 23, 1928
Sun Sign: Leo
Birthplace: Philadelphia, Pennsylvania
Died: December 25, 2016

American astronomer Vera Rubin is best known for her pioneering discoveries on galaxy rotation rates, her groundbreaking work confirming the existence of dark matter and for her life-long advocacy for women in science. She studied the galactic rotation curves and provided strong evidence of the existence of dark matter. The Vera C. Rubin Observatory in Chile is named after her.

 30 
Cecilia Payne-Gaposchkin
(Astronomer, Astrophysicist)

Cecilia Payne-Gaposchkin
6
Birthdate: May 10, 1900
Sun Sign: Taurus
Birthplace: Wendover, Buckinghamshire, England
Died: December 7, 1979

After losing her father at 4, Cecilia Payne-Gaposchkin was raised singlehandedly by her mother. The incredibly talented Cecilia studied at Cambridge but failed to secure a degree because of her gender. She later joined Harvard and opposing prevalent beliefs, proposed that stars were mainly made of hydrogen and helium. 

 31 
Dennis Ritchie
(Computer Scientist)

Dennis Ritchie
11
Birthdate: September 9, 1941
Sun Sign: Virgo
Birthplace: Bronxville, New York, United States
Died: October 12, 2011

Computer scientist, Dennis MacAlistair Ritchie, worked at Bell Labs Computing Sciences Research Center for most of his career, co-developing the Unix operating system and B programming language with Kenneth Thompson, co-winning the 1983 A.M. Turing Award for it. Earlier, he had also created C programming language and was involved with the development of the Plan 9 and Inferno operating systems.

 32 
Temple Grandin
(Scientist)

Temple Grandin
4
Birthdate: August 29, 1947
Sun Sign: Virgo
Birthplace: Boston, Massachusetts, United States

Temple Grandin is an American activist and scientist. An outspoken proponent of the neurodiversity and autism rights movements, Grandin is one of the first individuals to document the insights gained from her own experience of autism. She has also authored over 60 scientific papers on animal behavior. Her life and work inspired the 2010 biographical drama film Temple Grandin.

 33 
John McCarthy
(Mathematician, Computer scientist, Engineer, University teacher)

John McCarthy
7
Birthdate: September 4, 1927
Sun Sign: Virgo
Birthplace: Boston
Died: October 24, 2011

 34 
Michio Kaku
(Physicist who wrote the best-selling books Physics of the Impossible)

Michio Kaku
16
Birthdate: January 24, 1947
Sun Sign: Aquarius
Birthplace: San Jose, California, United States

Apart from teaching at the City College of New York, theoretical physicist Michio Kaku also often pens his thoughts in blogs and has written several bestselling books, such as The God Equation. His research is focused on the string theory. He also believes in the existence of aliens.

Har Gobind Khorana
5
Birthdate: January 9, 1922
Sun Sign: Capricorn
Birthplace: Punjab, India
Died: November 9, 2011

Born into a poor family in British India, Har Gobind Khorana studied on scholarships and later bagged a seat at the University of Liverpool and thus moved to England. The renowned biochemist ended up winning the Nobel Prize for his research on how nucleotides in nucleic acids control protein synthesis.

 36 
Tom Lehrer
(American musician)

Tom Lehrer
13
Birthdate: April 9, 1928
Sun Sign: Aries
Birthplace: New York, Manhattan

While he grew up to be a Harvard math professor, that didn’t stop Tom Lehrer from pursuing his childhood love for music. He gained fame as a satirical composer, with songs such as So Long, Mom, I’m Off to Drop the Bomb and That Was The Year That Was.

 37 
Sam Harris
(Philosopher, Author)

Sam Harris
5
Birthdate: April 9, 1967
Sun Sign: Aries
Birthplace: Los Angeles, California, United States

One of the "Four Horsemen of Atheism," neuroscientist and author Sam Harris is known for his works on topics such as religion, artificial intelligence, and terrorism. His books include the New York Times bestseller The End of Faith. He hosted the podcast Making Sense and released a meditation app, too.

 38 
Dorothy Vaughan
(Mathematician)

Dorothy Vaughan
29
Birthdate: September 20, 1910
Sun Sign: Virgo
Birthplace: Kansas City, Missouri, United States
Died: November 10, 2008

American mathematician Dorothy Vaughan was also known as a "human computer." Initially a math teacher, she became the first African-American supervisor of NACA, later part of NASA, at a time when racial segregation was rampant in the U.S. Her contribution to the early American space programs is invaluable.

 39 
Terence McKenna
(Ethnobotanist)

Terence McKenna
5
Birthdate: November 16, 1946
Sun Sign: Scorpio
Birthplace: Paonia, Colorado, United States
Died: April 3, 2000
Philosopher, ethnobotanist, and public speaker Terence McKenna was the proponent of concepts such as the Novelty Theory and Machine Elf. His work revolved around subjects such as psychedelic drugs, shamanism, alchemy, and metaphysics. He wrote several books and supported the usage of psychedelic mushrooms to experience different states of mind.

 40 
James Watson
(Molecular Biologist Who Co-discovered the Double Helix Structure of DNA With Francis Crick)

James Watson
13
Birthdate: April 6, 1928
Sun Sign: Aries
Birthplace: Chicago, Illinois, United States

James Watson is a geneticist, molecular biologist, and zoologist. He is credited with co-authoring the academic paper that propounded the double helix structure of nucleic acids such as DNA for which he was awarded the Nobel Prize in 1962. In 1977, he was honored with the Presidential Medal of Freedom. In 1997, he was awarded the National Medal of Science.

 41 

Glenn T. Seaborg
4
Birthdate: April 19, 1912
Sun Sign: Aries
Birthplace: Ishpeming, Michigan
Died: February 25, 1999

Glenn T. Seaborg was an American chemist who shared the 1951 Nobel Prize in Chemistry with Edwin McMillan for discovering the first transuranium elements. He also authored or co-authored several books and articles, including 500 scientific journals. In 2005, Glenn T. Seaborg was inducted posthumously into the National Inventors Hall of Fame.

 42 
Norman Borlaug
(Agronomist)

Norman Borlaug
6
Birthdate: March 25, 1914
Sun Sign: Aries
Birthplace: Cresco, Iowa, United States
Died: September 12, 2009

Norman Borlaug was an American agronomist who played a key role in the Green Revolution, a set of research technology transfer initiatives that increased agricultural production, for which he won the Nobel Peace Prize in 1970. Nicknamed the Father of the Green Revolution, Borlaug was also honored with the Congressional Gold Medal and Presidential Medal of Freedom for his work.

 43 
John Harvey Kellogg
(Doctor, Inventor)

John Harvey Kellogg
4
Birthdate: February 26, 1852
Sun Sign: Pisces
Birthplace: Tyrone Township, Michigan, United States
Died: December 14, 1943
Physician, nutritionist, and businessman John Harvey Kellogg served as the director of the Battle Creek Sanitarium, which was a combination of a European spa, a hydrotherapy center, a hospital, and a hotel. He believed in biologic living. However, he is best remembered as the inventor of corn flakes.

 44 
Clyde Tombaugh
(Astronomer, University teacher)

Clyde Tombaugh
7
Birthdate: February 4, 1906
Sun Sign: Aquarius
Birthplace: Streator
Died: January 17, 1997

Though he wasn’t formally educated in astronomy, Clyde Tombaugh was immensely interested in the subject since childhood and had built his own telescope after high school. He grew up to discover Pluto, then regarded as the ninth planet but later declared a "dwarf planet," and many other celestial bodies.

 45 
Murray Gell-Mann
(Physicist)

Murray Gell-Mann
6
Birthdate: September 15, 1929
Sun Sign: Virgo
Birthplace: Manhattan, New York City, U.S.
Died: May 24, 2019

Nobel Prize-winning American physicist Murray Gell-Mann is best remembered for his research on elementary particles. The Yale and MIT alumnus later taught at Caltech and is credited with coining the terms "quark" and "strangeness" in quantum physics. A linguistic enthusiast, he also co-established the Evolution of Human Languages program.

 46 
Ronald McNair
(Physicist, Astronaut)

Ronald McNair
9
Birthdate: October 21, 1950
Sun Sign: Libra
Birthplace: Lake City
Died: January 28, 1986

A doctorate in physics from MIT Cambridge, Ronald McNair worked on chemical lasers before joining NASA and in 1984 flew as a mission specialist on STS-41-B aboard Challenger, becoming the second African-American to do so. In January 1986, he was selected to fly on STS-51-L, but was killed along with rest of the crews when Challenger disintegrated soon after liftoff.

 47 
John G. Trump
(Scientist)

John G. Trump
7
Birthdate: August 21, 1907
Sun Sign: Leo
Birthplace: New York, New York, United States
Died: February 21, 1985

Better known as former U.S. president Donald Trump’s uncle, John G. Trump was an MIT physicist and engineer. Though he had initially aspired to be an architect and join his brother Fred’s real-estate business, John later concentrated on his research that led to the invention of high-voltage generators.

 48 
Alan Kay
(Computer Scientist)

Alan Kay
8
Birthdate: May 17, 1940
Sun Sign: Taurus
Birthplace: Springfield, Massachusetts

 49 
Jennifer Doudna
(Biochemist)

Jennifer Doudna
4
Birthdate: February 19, 1964
Sun Sign: Pisces
Birthplace: Washington, D.C., United States

American biochemist Jennifer Doudna of the University of California, Berkeley, who has made fundamental contributions in biochemistry and genetics, is best-known for her pioneering work in CRISPR gene-editing. Doudna and Emmanuelle Charpentier received the 2020 Nobel Prize in Chemistry for developing a method for genome editing through CRISPR, marking them as the only two women to share science Nobel ever.

 50 

Lewis Howard Latimer
4
Birthdate: September 4, 1848
Sun Sign: Virgo
Birthplace: Chelsea, Massachusetts, United States
Died: December 11, 1928
Lewis Howard Latimer was born to former slaves and went on to become a skilled patent draftsman. He had worked with Alexander Graham Bell on the patent of his telephone, and with the Edison Electric Light Company. He had also invented a modification of the process of making carbon filaments.