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3321857
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Patent Grant
3321857
References
Source
Patent Number
3,321,857
Date Filed
Not available
Date Issued
Tuesday, May 30, 1967
57 years ago
CPC
G08B5/40 - using smoke, fire or coloured gases
US Classifications
040 - Card, picture, or sign exhibiting
D11 - Jewelry, symbolic insignia, and ornaments
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