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2172986
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Information
Patent Grant
2172986
References
Source
Patent Number
2,172,986
Date Filed
Not available
Date Issued
Tuesday, September 12, 1939
85 years ago
CPC
A01B63/06 - operated mechanically by tractor motor
Y10T74/1555 - Rotary driven element
US Classifications
172 - Earth working
074 - Machine element or mechanism
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