Title:
Observing unit
United States Patent 2542675
US Patent References:
/0534740.html
- - 0534740

/0748346.html
- - 0748346

Indicator
- - 1779684

Game-scoring apparatus
- - 1789890

Door service indicator
- - 2029209


Inventors:
Lee, Hoffman Harry
Publication Date:
02/20/1951
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Assignee:
Lee, Hoffman Harry
Primary Class:
40/495
Other Classes:
40/446
International Classes:
G09F19/00