April Calendar

April Calendar of Famous Inventions, Trademarks, Copyrights, and Patents

inverted novelty mask invented in April
April Calendar - Inverted novelty mask patented in April. USPTO

Find out what famous event happened on the April calendar concerning patents, trademarks, or copyrights. What famous inventor has the same April birthday as you or what invention was created on that day.

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April Calendar

Find out what famous event happened on the April Calendar for history concerning patents, trademarks, or copyrights. What famous inventor has the same April birthday as you.

April 1

1953 Arthur Miller's The Crucible a play in 4 acts was copyrighted.

April Fools' Day

April 2

1889 Charles Hall patented an inexpensive method for the production of aluminum, which brought the metal into wide commercial use.

April 3

1973 Francis W. Dorion was granted patent #3,724,070 for a "dual razor blade assembly".

April 4

1978 Francisco Garcia was granted patent #4,081,909 for "orthodontic pliers".

April 5

1881 Houston and Thomson were granted a patent for a centrifugal separator - the creamer.

April 6

1869 Isaac Hodgson received patent #88,711 for the "roller skate".

April 7

1896 Tolbert Lanston was issued a patent for the monotype printing press.

April 8

1766 The first fire escape was patented. The contraption was a wicker basket on a pulley with a chain.
1997 Hooshan Bral received a patent for an automatically rinsing baby bottle

April 9

1974 Phil Brooks received a patent for a disposable syringe. Intravenous injections and infusion began as early as 1670.

April 10

1849 Walter Hunt patented the first safety pin.
Hunt also invented several other famous things, all of which he gave up on before seeing any profit.

April 11

1893 Frederic Ives patented the process for half-tone printing press.

April 12

1988 Leder and Stewart on behalf of Harvard University were issued the first patent #4,736,866 for a new animal life form - a genetically altered mouse.

April 13

1990 "Teenage Mutant Ninja Turtles" movie was copyrighted.

April 14

1964 Paul Winchell (ventriloquist) was granted patent # 3,129,001 for an "inverted novelty mask".

April 15

1452 Leonardo da Vinci of Italy the legendary painter, sculptor, inventor, scientist and visionary was born.

1997 Bertram Burke received a patent for an automatic philanthropic contribution system called the MILLIONAIRE'S CLUB.

April 16

1867 Wilbur Wright of aeronautical fame was born. Wilbur and his brother Orville Wright invented the airplane, which they called a flying machine.
1997 James Watkins received a patent for confetti "that flutters and darts".

April 17

1875 "Snooker" a variation of pool was invented by Sir Neville Chamberlain.
1908 "Hail Hail the Gangs All Here" the song, was copyrighted.

April 18

1916 Irving Langmuir received a patent for an incandescent gas lamp. Among his other accomplishments was the introduction of atomic-hydrogen welding and contributions to the development of the radio vacuum tube.

April 19

1877 Ole Evinrude the inventor of the outboard marine engine was born.
1939 John Steinbeck's "The Grapes of Wrath" was copyrighted.

April 20

1897 Simon Lake was granted a patent for an even keel submarine.

April 21

1828 Noah Webster published the first American dictionary.
1857 Albert Douglas patented a ladies bustle.
1931 Ester Kiefer received a patent for ornamental paper.

April 22

1864 The US minted the first coin with "In God We Trust" on it.
1884 John Golding patented a process for metallic silk screening.

1955 Congress declared that all coins would be minted with "In God We Trust".

April 23

1964 "My Fair Lady" the movie based on a musical version of George Bernard Shaw's play "Pygmalion" was registered.
1985 The trade secret "New Coke" formula was released. Coca-Cola was invented by John Pemberton of Atlanta, Georgia. The famous trademark name was a suggestion given by Pemberton's bookkeeper Frank Robinson.

April 24

1743 Edmund Cartwright of England was born. Cartwright was a cleric and the inventor of the power loom, invented in 1785.
1907 "Anchors Aweigh" the march and two-step by Chas. A. Zimmerman was copyrighted.

April 25

1961 Robert Noyce was granted a patent for a semi-conductor device-and-lead structure, the integrated circuit otherwise known as the chip. Noyce was the co-founder of the Intel Corporation.

April 26

1881 Frederick Allen patented a life raft.
1892 Sarah Boone patented an ironing board.

April 27

1791 Samuel Finley Breece Morse, the inventor of the telegraph and morse code was born.
1896 Wallace Hume Carothers, the inventor of nylon was born.
1920 Elijah McCoy received a patent for an air brake pump lubricator.

April 28

1908 Leonard Dyer obtained a patent for an automobile transmission.

April 29

1873 Eli Janney received a patent for automatic railroad car couplings.

April 30

1935 Patent #2,000,000 issued to Joseph Ledwinka for vehicle wheel construction.

Continue >> April Birthdays

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April Birthdays

What famous inventor or scientist has the same April birthday as you. The fourth month of the year in the Gregorian calendar.

April 1

  • 1578 - English physician, William Harvey discovered blood circulation
  • 1858 - Italian sociologist, Gaetano Mosca wrote the Circulation of Elite
  • 1865 - Germany chemist, Richard Zsigmondy won the Nobel Prize in 1925
  • 1887 - American linguist, Leonard Bloomfield
  • 1922 - American scientist, Alan Perlis

April 2

  • 1618 - Mathematician & physicist, Francesco M. Grimaldi discovered light defraction
  • 1841 - French engineer, Clement Ader
  • 1875 - Walter Chrysler founded the Chrysler car company
  • 1900 - German musicologist, Heinrich Besseler
  • 1922 - Russian atomic physicist, Nikolaj G. Bassov worked with lasera and won the Nobel Prize in 1964
  • 1948 - Noted astronomer & educator, Eleanor Margaret Burbridge

April 3

  • 1837 - Writer & nature enthusiast, John Burroughs had the Burroughs Medal named after him
  • 1934 - English ethologist, Jane Goodall studied African chimps

April 4

  • 1809 - American mathematician & astronomer, Benjamin Pierce
  • 1821 - Linus Yale was an American portrait painter and inventor, who invented the Yale cylinder lock
  • 1823 - Karl Wilhelm Siemens was an inventor, who laid undersea cables
  • 1826 - Zenobe Theophile Gramme invented an electric motor
  • 1881 - Encylopediest, Charles Funk produced Funk and Wagnalls
  • 1933 - English manufacturer, Robin Phillips invented a hand-dryer

April 5

  • 1752 - Sebastien Erard invented improved pianos and harps
  • 1838 - American invertebrate paleontologist, Alpheus Hyatt
  • 1899 - American inventor, Alfred Blalock
  • 1951 - Dean Kamen invented the Segway, the AutoSyringe, a mobile dialysis system, and the insulin pump
  • 1954 - Computer programmer, Michael W. Butler invented the TODAY program

April 6

  • 1920 - Swiss scientist, Edmond H. Fischer won the 1992 Nobel Prize in Medicine with Edwin Krebs for their discoveries in reversible protein phosphorylation
  • 1928 - Chemist, James D. Watson co-discovered the structure of DNA
  • 1953 - American inventor, Andy Hertzfeld was a co-inventor of the Apple Macintosh, who started a new company called General Magic

April 7

  • 1775 - American businessman, Francis Cabot Lowell invented the first raw cotton-to-cloth textile mill
  • 1859 - Walter Camp was the father of American football, who invented many of the rules.
  • 1860 - Noted American vegetarian, Will Keith Kellogg was the founder of the Kellogg Company, who invented a process of making flaked cereal, corn flakes, for use as a healthy breakfast cereal.
  • 1869 - American botanist & explorer, David Grandison Fairchild brought new plants into the U.S.
  • 1890 - Noted environmentalist, Marjory Stoneman Douglas was nicknamed the first Lady of the Everglades

April 8

  • 1869 - American neurosurgeon, Harvey Cushing did the first blood pressure studies
  • 1907 - Noted chemist Maurice Stacey
  • 1911 - American chemist, Melvin Calvin won the Nobel Prize in 1961 for his work on photosynthesis

    April 9

    • 1806 - Isambard Kingdom Brunel invented the first transatlantic steamer
    • 1830 - Eadweard Muybridge pioneered the study of motion photography
    • 1919 - John Presper Eckert was the co-inventor of the first all electronic computer called the ENIAC

    April 10

    • 1755 - German physician, Samuel Hahnemann invented homeopathy
    • 1917 - Organic chemist, Robert Burns Woodward won the Nobel prize in 1965

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    April Birthdays

    What famous inventor or scientist has the same April birthday as you. The fourth month of the year in the Gregorian calendar.

    April 11

    • 1899 - Chemist, Percy L. Julian invented drugs for the treatment of arthritis called cortisone
    • 1901 - Adriano Olivetti, Italian engineer & manufacturer of typewriters

      April 12

      • 1884 - German psychologist & biochemist, Otto Meyerhof won the Nobel Prize in 1922
      • 1926 - James Hillman credited with developing archetypal psychology

      April 13

      • 1832 - British designer & inventor, James Wimshurst invented the electricstatic generator
      • 1899 - Alfred Moser Butts invented Scrabble

      April 14

      • 1886 - American psychologist, Edward C. Tolman created behaviorism

      April 15

      April 16

      • 1682 - John Hadley invented the first reflecting telescope
      • 1867 - Wilbur Wright coinvented the first manned and engined airplane

      April 17

      • 1934 - Don Kirshner invented bubblegum music

      April 18

      April 19

      • 1768 - English entomologist & botanist, Adrian H Haworth
      • 1877 - Ole Evinrude invented the outboard marine engine
      • 1912 - American chemist, Glen T. Seaborg discovered plutonium and won the Nobel Prize in 1951
      • 1931 - American scientist, Fred Brooks

      April 20

      • 1745 - Physician, Philippe Pinel is considered the founder of psychiatry
      • 1921 - Donald Gunn MacRae, a noted sociologist
      • 1927 - Swiss superconductivity physicist, Karl Alex Muller won the Nobel Prize in 1987 for his discovery of high-temperature superconductivity in a new class of materials
      • 1934 - Lindsay Oliver John Boynton, a noted furniture historian

      <<< March - May >>>

      April Birthdays

      What famous inventor or scientist has the same April birthday as you. The fourth month of the year in the Gregorian calendar.

      April 21

      • 1782 - German educator, Friedrich W. A. Frobel invented kindergarten
      • 1849 - German embryologist, Oskar Hertwig discovered fertilization
      • 1913 - Biochemist, Choh Hao Li isolated growth hormones

        April 22

        • 1799 - Physician & physiologist, Jean Poiseuille discovered blood pressure
        • 1853 - French anthropologist, Alphonse Bertillon devised the crime ID system
        • 1876 - Sweden otologist, Robert Barany was a vestibular expert, who won the Nobel Prize in 1914
        • 1919 - American biochemist, Donald Cram won the Nobel Prize in 1987
        • 1929 - Margaret Pereira, noted forensic scientist

        April 23

        • 1858 - German physicist, Max Planck wrote the Planck Constant and won the Nobel Prize in 1918
        • 1917 - Nuclear physicist, Jacob Kistemaker invented an ultra centrifuge

        April 24

        • 1620 - Statistician, John Graunt founded the science of demography
        • 1743 - Edmund Cartwright invented the power loom
        • 1914 - Justin Wilson invented Wise Potato Chips

        April 25

        • 1769 - Mark Isambard Brunel was a noted engineer & inventor1825 - Charles Ferdinand Dowd standardized time zones
        • 1874 - Guglielmo Marconi invented a radio system, and won the Nobel Prize in 1909
        • 1900 - Swiss/American physicist, Wolfgang Pauli discovered the Pauli inhibition and won the Nobel Prize in 1945

        April 26

        • 1879 - English, physicist, Owen Williams Richardson won the Nobel Prize in 1928.

        April 27

        • 1896 - Wallace Hume Carothers invented nylon
        • 1903 - Biochemist, Hans Walter Kosterliz

        April 28

        • 1846 - Swedish astronomer, Johann E. Backlund discovered planets & asteroids
        • 1882 - Italian industrialist, Alberto Pirelli

        April 29

        • 1893 - Physicist, Harold C Urey discovered Deuterium and won the Nobel Prize in 1934

        April 30

        • 1777 - Carl Friedrich Gauss is considered the world's great mathematician