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Black History Month - African American Inventors

Black History Inventors - Patent Holders List Index

By Mary Bellis, About.com Guide

Black History Month - African American Inventors

David Crosthwait Patent #1,661,323

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B < Cadet to Cassell, Certain to Clark, Coates to Cosgrove, Cotton to Curtis > D

Donald J. Cotton

#4,040,932, 8/9/1977, Vertical liquid electrode employed in electrolytic cells
#4,327,443, 4/27/1982, Capillary liquid fuel nuclear reactor

Beatrice L. Cowans

#4,016,314, 4/5/1977, Embroidered fruit bowl wall hanging and kit

Elbert L. Cox

#3,334,245, 8/1/1967, Presettable bistable circuits

Alfred L. Cralle

#576,395, 2/2/1897, Ice-cream mold and disher

Samuel T. Crawford

#1,381,804, 6/14/1921, Comb

Henry Creamer

#313,854, 3/17/1885, Steam feed-water trap
#358,964, 3/8/1887, Steam feed-water trap
#376,586, 1/17/1888, Steam trap
#394,463, 12/11/1888, Steam trap and feeder

Benjamin A. Crenshaw

#1,836,705, 12/15/1931, Signaling device

Francis D. Crichton

#1,855,824, 4/26/1932, Flag staff

Frank Alphonso Crossley

#2,798,807, 7/9/1957, Titanium base alloy
#3,117,001, 1/7/1964, Grain refinement of beryllium with tungsten carbide and titanium diboride
#4,420,460, 12/13/1983, Grain refinement of titanium alloys

David Nelson Crosthwait Jr

#1,353,457, 9/21/1920, Apparatus for returning water to boilers

#1,661,323, 3/6/1928, Method and apparatus for setting thermostats

#1,755,430, 4/22/1930, Differential vacuum pump

#1,797,258, 3/24/1931, Steam trap

#1,871,044, 8/9/1932, Automatic discharge valve

#1,874,911, 8/30/1932, Freezing temperature indicator

#1,874,912, 8/30/1932, Refrigerating method and apparatus

#1,893,883, 1/10/1933, Exhausting mechanism

#1,930,224, 10/10/1933, Bucket trap

#1,946,524, 9/4/1934, Refrigerating method and apparatus

#1,963,735, 6/19/1934, Method of steam heating from central station mains

#1,972,704, 9/4/1934, Refrigerating apparatus and process

#1,972,705, 2/13/1934, Vacuum pump

#1,977,303, 10/16/1934, Steam heating system

#1,977,304, 10/16/1934, Steam heating apparatus

#1,986,391, 1/1/1935, Vacuum heating system

#2,007,240, 8/9/1935, Remote control proportional movement motor

#2,064,197, 12/15/1936, Method of heating

#2,086,258, 7/6/1937, Effective temperature thermostat

#2,094,738, 10/5/1937, Effective temperature control

apparatus

#2,096,226, 10/19/1937, Exhausting method and apparatus

#2,102,197, 12/14/1937, One pipe heating system regulating plate

#2,114,139, 4/12/1938, Regulating radiator valve

James H. Crumble

#2,384,536, 9/11/1945, Float operated mechanism

William Childs Curtis

#4,034,373, 7/5/1977, Airborne moving-target indicating radar system