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| All Patents in class 175/385 | |||||
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| Number | Date | Patentee | Title | Type | |
| 91,387 | Jun. 15, 1869 | A. Vaughan | Improved post auger | ||
| 139,769 | Jun. 10, 1873 | W.A. Clark | Improvement in Ice-Augers | auger bits | |