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3898021
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Information
Patent Grant
3898021
References
Source
Patent Number
3,898,021
Date Filed
Not available
Date Issued
Tuesday, August 5, 1975
48 years ago
CPC
F04C14/20 - by changing the form of the inner or outer contour of the working chamber
F04C11/003 - having complementary function
F16H39/06 - pump and motor being of the same type
US Classifications
418 - Rotary expansible chamber devices
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