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| WOOD, Albert A. Location:
Patent: 662683
Type: Hollow Auger
Date: Nov 27, 1900
Remarks:
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| BONNEY, C.S. Location:
Patent: 105896
Type: Hollow Auger
Date: Aug 2, 1870
Remarks:
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| SMITH, Heston J. Location: Three Tons, Pennsyslvania
Patent: 7689
Type: Hollow Auger
Date: May 22, 1877
Reissued: March 30, 1880
Remarks:
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