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3206187
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Information
Patent Grant
3206187
References
Source
Patent Number
3,206,187
Date Filed
Not available
Date Issued
Tuesday, September 14, 1965
59 years ago
CPC
E21F1/10 - Air doors
US Classifications
160 - Flexible or portable closure, partition, or panel
049 - Movable or removable closures
454 - Ventilation
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