Display device
United States Patent 3025613
US Patent References:
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- - 1619818

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- - 1722659

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- - 2250237

Combination plastic and metal building construction
- - 2438140


Inventors:
Mitchell, Charles R.
Publication Date:
03/20/1962
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Assignee:
BURTEK INC
Primary Class:
434/430
International Classes:
G09B5/02; G09B5/00
US Patent References:
2507872Implement or toolholder
Foreign References:
FR1118879A