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African American Inventors

Patent Holders List Index

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Print Washer - Clatonia Joaquin Dorticus

Print Washer - Clatonia Joaquin Dorticus

USPTO

C < Dacons to Dent, Dickenson to Dyer > E

Robert C. Dickenson

  • #1,314,130, 8/26/1970, Trolley guard

Joseph Hunter Dickinson

  • #624,192, 5/2/1899, Reed Organ
  • #915,942, 3/23/1909, Volume-controlling means for mechanical musical instruments
  • #926,178, 6/29/1909, Volume-controlling means for mechanical musical instruments
  • #1,028,996, 6/11/1912, Player-piano
  • #1,252,411, 1/8/1918, Phonograph

Lincoln Isaiah Diuguid

  • #4,539,015, 9/3/1985, Burning efficiency enhancement method

James Dixon

  • #471,843, 3/29/1892, Car-coupling

Samuel Dixon Jr.

(Co-inventor Roger J. Malik)
  • #4,563,773, 1/7/1986, Monolithic planar doped barrier subharmonic mixer

Lewis B. Dorcas

  • #868,417, 10/15/1907, Stove

Linneaus Cuthbert Dorman

  • #3,468,926, 9/23/1969, 3,5-Dihalo-4-cyanoalkoxy phenols
  • #4,517,111, 5/14/1985, Absorbents for airborne formaldehyde
  • #4,842,604, 6/17/1989, Composites of unsintered calcium phosphates and synthetic biodegradable polymers useful as hard tissue prosthetics

Osbourn Dorsey

  • #210,764 12/10/1878, Door-holding device

Clatonia Joaquin Dorticus

  • #535,820, 3/19/1895, Device for applying coloring liquids to sides of soles or heels of shoes
  • #537,442, 4/16/1895, Machine for embossing photographs
  • #537,968, 4/23/1895, Photographic print washer
  • #629,315, 7/18/1899, Hose leak stop

William Douglass

  • #789,010, 5/2/1905, Self-binding harvester
  • #789,120, 5/2/1905, Band-twister
  • #789,122, 5/2/1905, Carrier chain

Gertrude E. Downing & William P. Desjardin

  • #3,715,772, 2/13/1973, Reciprocating corner and baseboard cleaning auxiliary attachment for rotary floor treatment machines

Philip B. Downing

  • #430,118, 6/17/1890, Street railway switch
  • #462,092, 10/27/1891, Letter Box
  • #462,093, 10/27/1891, Letter Box

James Doyle

  • #659,057, 10/2/1900, Serving apparatus for dining rooms
  • #1,019,137, 3/5/1912, Automatic serving system
  • #1,098,788, 6/1/1914, Server for automatic serving systems

Dr. Charles Richard Drew

  • Blood bank

Cortland Otis Dugger

  • #3,595,803, 7/27/1971, Method for growing single oxide crystals "Duggerite"
  • #3,624,547, 11/30/1971, Solid-state laser produced by a chemical reaction between a germinate and an oxide dopant
  • #3,933,573, 1/20/1976, Aluminum nitride single crystal growth from a molten mixture with calcium nitride

James Henry Dunnington

  • #578,979, 3/16/1897, Horse detacher

Charles A. Dyer

  • #3,732,632, 5/15/1973, Teaching aid

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