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IT'S ABOUT TIME  
A listing of famous and not-so-famous historical innovations that
occurred in Science and Technology during this month.
April
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1
1908-Abraham Harold Maslow was a U.S. psychologist who believed that man has a natural drive to healthiness, and developed this into his self-actualization theory of psychology born  
2
1875-Walter Percy Chrysler was an American industrialist and inventor who founded his own company, Chrysler Motors born in Wamego, Kansas
3
1827-Ernst Florens Friedrich Chladni German physicist, known as the "father of acoustics" for his mathematical investigations of sound waves.
4
1821-Linus Yale Jr. inventor of the Yale lock born in Salisbury, New York
1950-Patent # 2,502,488 issued to J. Bardeen, W. Brattain, and W. Shockley for the transistor
5
1961-Dean Kamen inventor of the Segway Transporation System born in Rockville Centre, N.Y.
6
1869-Patent # 88,711 issued to Isaac Hodgson for the "roller skate"
7
1860-Will Keith Kellogg inventor of Kellogg's Corn Flakes born in Battle Creek, Michigan
8
1996-Benjamin Eisenstadt inventor of Sweet n' Low  Patent # 3,625,711, born
9
1919-John Presper Eckert, Jr. was an American engineer and co-inventor of the first general-purpose electronic computer born
10
1790-President George Washington signed the bill establishing the American patent system.
1849-Patent # 6,281 issued to Walter Hunt for the safety pin
11
1899-Percy L. Julian African-American chemist, whose 100 patents include the synthesis of cortisone, hormones, and other products from soybeans born
12
1988-Drs. 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
13
1869-Patent # 88,929 issued to George Westinghouse for air brake
1971-Patent # 3,574,791 issued to Patsy Sherman and Sam Smith for SCOTCHGARD
14
1914-Patent # 1,093,310 issued to Stacy G. Carkhuff of the Firestone Rubber Co, for a non-skid tire pattern (tread).
15
1452-Leonardo di ser Piero da Vinci is born in the small town of Vinci, in Tuscany, Italy
16
1867-Orville Wright co-inventor of powered flight born in in Millville, Indiana
17
1973-Patent # 3,728,480 issued to Ralph Baer for Magnavox Odyssey Video game system
18
2003-Edgar Frank Codd inventor of the theoretical foundation of relational database died
19
1877-Ole Evinrude, inventor of the outboard motor, born in Oslo, Norway
1956-Yahtzee Trademarked, Reg. No. 0642862
20
1902-Marie and Pierre Curie isolated one gram of radium, the first sample of the radioactive element. They had refined it from eight tons of pitchblende ore.
21
1857-Patent # 17,082 issued to Alexander Douglas, the first U.S. patent for a bustle
22
1924-Patent # 1,490,987 issued to Harry E. Soref.for a laminated padlock
23
1856-Granville T. Woods, inventor of a Multiplex Railway Telegraph, born in  Columbus, Ohio
24
1981-the first IBM personal computer was introduced.
25
1874-Guglielmo Marconi inventor of a practical radio-signaling system born in Bologna, Italy 
26
1900-Dr. Charles Francis Richter was a seismologist and inventor of the Richter Scale that measures earthquake intensity
27
1847-Henry Marcus Quackenbush, inventor of a nutcracker, born in Herkimer, New York
28
1937-Wallace Hume Carothers inventor of Nylon died
29
1913-Patent # 1,060,378  issued to Gideon Sundback for the zipper
30
1883-A company that would build the first U.S. three-wire central station for incandescent lighting - the Edison Electric Illuminating Co. was incorporated.
DID YOU KNOW? 
  • April is the fourth month of the year in the Gregorian Calendar and one of four with the length of 30 days.
  • April's birthstone is the diamond.
  • April in the Northern Hemisphere is the seasonal equivalent to October in the Southern Hemisphere and vice versa.
  • Chocolate Eaters Month
  • Mathematics Awareness Month
  • Reading Is Fun Week (begins last Sun)
  • Teacher Appreciation Week (begins Last Mon)
  • Arbor Day  (last Friday)
  • April Fool's Day (April 1)
  • Earth Day (April 22)
WHO AM I ?
I founded the FIRST youth invention program and invented the Segway human transpoter?
Learn more...
DID YOU KNOW?
Everything that the son knew about locks he learned from his father, Linus Yale Sr..
Learn more...
FUN FACTS
Ole Evinrude, inventor of the outboard motor, born in Oslo, Norway
Learn more...
EVER WONDER
Did you ever wonder who invented that marvelous piece of bent wire known as the safety pin?
Learn more.
TRIVIA
Marie and Pierre Curie isolated one gram of radium, the radioactive element. in 16,000 pounds of pitchblende ore.
Learn more...
QUOTATIONS
The first thing you want in a new country, is a patent office."
-  Mark Twain, 1889
555 YEARS AGO
On April 15, 1452 Leonardo da Vinci is born in the small town of Vinci, in Tuscany, Italy
Learn more..
ON THIS DAY
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