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April Calendar

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

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inverted novelty mask invented in April

April Calendar - Inverted novelty mask patented in April

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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.

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