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2072844
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Patent Grant
2072844
References
Source
Patent Number
2,072,844
Date Filed
Not available
Date Issued
Tuesday, March 9, 1937
87 years ago
CPC
G10B3/16 - Swell chambers Accentuating means
US Classifications
091 - Motors: expansible chamber type
049 - Movable or removable closures
084 - Music
092 - Expansible chamber devices
984 - Musical instruments
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