Title:
Display device
United States Patent 2598755
Inventors:
Birch, Thomas H.
Publication Date:
06/03/1952
Export Citation:
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Assignee:
Birch, Thomas H.
Primary Class:
40/776
Other Classes:
40/734, 156/99, 156/249, 156/290
International Classes:
A47G1/06; G09F1/02; A47G1/06; G09F1/00
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US Patent References:
2283026N/A
2186827Lantern slide construction kit
2139377Display unit
Foreign References:
AT139341B
GB567181A