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1855–1905. Inventor. Folding "cabinet-bed", forerunner of the Murphy bed; first African-American woman to receive a patent in the United States. [ 81][ 82][ 83] Grant, George F. 1846–1910. Dentist, professor. The first African-American professor at Harvard, Boston dentist, and inventor of a wooden golf tee .
Andrew Jackson Beard. Miriam Benjamin. Henry Blair (inventor) Sarah Boone. Otis Boykin. Benjamin Bradley (inventor) Charles B. Brooks. Henry Brown (inventor) Marie Van Brittan Brown and Albert L. Brown.
1934 Acrostic (puzzle) An acrostic is a type of word puzzle, related somewhat to crossword puzzles, that uses an acrostic form with lettered clues and numbered blanks. The acrostic puzzle was invented in 1934 by Elizabeth Kingsley, first appearing in the March 31 edition of the Saturday Evening Post. [256] 1935 Richter magnitude scale
Add a letter and crack the code! Add a letter and crack the code!
Kakuro or Kakkuro or Kakoro ( Japanese: カックロ) is a kind of logic puzzle that is often referred to as a mathematical transliteration of the crossword. Kakuro puzzles are regular features in many math-and-logic puzzle publications across the world. In 1966, [ 1] Canadian Jacob E. Funk, an employee of Dell Magazines, came up with the ...
Category. : African-American scientists. Wikimedia Commons has media related to African American engineers and scientists. This is a non-diffusing subcategory of Category:American scientists. It includes scientists that can also be found in the parent category, or in diffusing subcategories of the parent.
Thomas Elkins (1818 – August 10, 1900) [1] was an African-American dentist, abolitionist, surgeon, pharmacist, and inventor. He lived in Albany, New York, for most of his life, but travelled during his service as the medical examiner of the 54th and 55th Massachusetts infantries and visited Liberia. Notable inventions include patented ...
1950, Sasol, the country's largest fuel producer, was founded. 1950, Q20 lubricant was invented by Mr. Robertson in Pinetown. [ 2] Q20 is an all purpose lubricating spray that is owned by the Triton-Leo Group (Pty) Ltd. [ 3] The name derives from "it has 20 answers to 20 questions". 1957, Flame ionization detector by Harley and Pretorius at the ...