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Walter Sammons of Philadelphia filed an application for Patent No. 1,362,823 on April 9, 1920. The patent was granted on December 21, 1920. [ 16 ] Poro Company founder Annie Malone has been credited by some sources with receiving the first patent for this tool in that same year but the Official Gazette of the U. S. Patent Office does not list ...
This list of African-American inventors and scientists documents many of the African Americans who have invented a multitude of items or made discoveries in the course of their lives. These have ranged from practical everyday devices to applications and scientific discoveries in diverse fields, including physics, biology, math, and medicine.
2 why isn't Walter Sammons in this. 1 comment. 3 Otis Boykin didn't invent the guided missile. 1 comment. 4 Conversion to timeline? 2 comments. 5 Why only American ...
Walter Frederick Morrison, the inventor of the plastic flying discs that eventually became known as the Frisbee, died at his Utah home on Tuesday. He was 90 and is survived by three children. For ...
Walter Lincoln Hawkins (March 21, 1911 – August 20, 1992) was an American chemist and engineer widely regarded as a pioneer of polymer chemistry.For thirty-four years he worked at Bell Laboratories, where he was instrumental in designing a long-lasting plastic to sheath telephone cables, enabling the introduction of telephone services to thousands of Americans, especially those in rural ...
Snelling was born in Washington, D.C., on December 13, 1880, the elder of two sons of Walter Comonfort Snelling (1859–1893) and Alice Lee Hornor (1861–1919).Walter Comonfort Snelling was an inventor who patented an adding machine. [1]
Tufts was born in Charlestown, Massachusetts on February 11, 1835, to Leonard Tufts and Hepzebah Fosdick Tufts. [1] He was "an entrepreneur, inventor, and philanthropist. He rose from being a sixteen-year-old drug store apprentice to becoming a wealthy businessman who had the vision and determination to build Pinehurst, in only six months."
Charles Walter Hart (July 6, 1872 — March 14, 1937) was an American mechanical engineer, inventor, and businessman. Together with Charles Henry Parr, he founded a company that produced a commercially successful line of gasoline-powered tractors. After being forced out of his company in 1917, he went on to work on further development of the ...