This month in History – April
Friday, April 28th, 2017
1973 Francis W. Dorion was granted patent #3,724,070 for a “dual razor blade assembly”.
1978 Francisco Garcia was granted patent #4,081,909 for “orthodontic pliers”.
1881 Houston and Thomson were granted a patent for a centrifugal separator – the creamer.
1869 Isaac Hodgson received patent #88,711 for the “roller skate”.
1896 Tolbert Lanston was issued a patent for the monotype printing press.
1849 Walter Hunt patented the first safety pin.
1893 Frederic Ives patented the process for half-tone printing press.
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.
1990 “Teenage Mutant Ninja Turtles” movie was copyrighted.
1939 John Steinbeck’s “The Grapes of Wrath” was copyrighted.
1775 American Revolution begins.
1897 Simon Lake was granted a patent for an even keel submarine.
1857 Albert Douglas patented a ladies bustle.
1931 Ester Kiefer received a patent for ornamental paper.
1907 “Anchors Aweigh” the march and two-step by Chas. A. Zimmerman was copyrighted.
1881 Frederick Allen patented a life raft.
1892 Sarah Boone patented an ironing board.
1920 Elijah McCoy received a patent for an air brake pump lubricator.
1908 Leonard Dyer obtained a patent for an automobile transmission.