System and apparatus for facsimile telegraphy
United States Patent 2158391

Inventors:
Wise, Raleigh J.
Publication Date:
05/16/1939
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Assignee:
WESTERN UNION TELEGRAPH CO
Primary Class:
358/476
Other Classes:
358/493, 358/1.900
International Classes:
H04N1/024; H04N1/04