Viewing device
United States Patent 3203052
US Patent References:
/0593160.html
- - 0593160

/1287349.html
- - 1287349

Observation device
- - 2064963

Door wicket
- - 2581234


Inventors:
Curtis Jr., Joseph A.
Publication Date:
08/31/1965
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Assignee:
Curtis Jr., Joseph A.
Primary Class:
49/70
Other Classes:
52/455, 362/145, 49/171, 359/839, 49/67
International Classes:
E06B7/30; E06B7/00