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2068861
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Patent Grant
2068861
References
Source
Patent Number
2,068,861
Date Filed
Not available
Date Issued
Tuesday, January 26, 1937
87 years ago
CPC
F28G3/14 - thrown into working position by centrifugal force
US Classifications
015 - Brushing, scrubbing, and general cleaning
175 - Boring or penetrating the earth
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