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2231176
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Information
Patent Grant
2231176
References
Source
Patent Number
2,231,176
Date Filed
Not available
Date Issued
Tuesday, February 11, 1941
83 years ago
CPC
A24F1/00 - Tobacco pipes
A24F2700/04 - Pipes filled with absorbant materials, pipes with devices filtering the smoke
US Classifications
131 - Tobacco
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