R A Cushman - meaning and definition. What is R A Cushman
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What (who) is R A Cushman - definition

AMERICAN INVENTOR
Austin Cushman; A. F. Cushman; A.F. Cushman

R. A. Cushman         
U.S. ENTOMOLOGIST (1880–1957)
Robert Asa Cushman
Robert Asa Cushman (6 November 1880 – 25 March 1957) was an American entomologist who worked mainly on agricultural entomology at the Bureau of Entomology in Washington DC. He also worked on the systematics of ichneumonid and chalcidoid wasps.
Joseph Augustine Cushman         
AMERICAN SCIENTIST (1881-1949)
J.A. Cushman; Joseph A. Cushman
Joseph Augustine Cushman (January 31, 1881 – April 16, 1949) was an American geologist, paleontologist and foraminiferologist.
David Cushman         
AMERICAN BIOCHEMIST (1939-2000)
David W. Cushman; Cushman, David
David Cushman (November 15, 1939 – August 14, 2000) was born in Indianapolis, Indiana. He was the son of Wayne B.

Wikipedia

Austin F. Cushman

Austin F. Cushman (June 18, 1830 – November 29, 1914) invented the self-centering Cushman universal chuck in 1862; his father-in-law, Simon Fairman, had previously invented the lathe chuck.