Electrophotography
United States Patent 2598732
US Patent References:
/0506109.html
- - 0506109

/0691535.html
- - 0691535

Method of and apparatus for producing pictures by projection
- - 1394797

Electron photography
- - 2221776

Electrophotography
- - 2297691


Inventors:
Walkup, Lewis E.
Publication Date:
06/03/1952
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Assignee:
HALOID CO
Primary Class:
430/54
Other Classes:
355/71, 430/396, 399/178, 396/505, 101/DIG.037
International Classes:
G03G15/04; G03G15/26; G03G15/00