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| All Patents in class 175/18 | |||||
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| Number | Date | Patentee | Title | Type | |
| 139,769 | Jun. 10, 1873 | W.A. Clark | Improvement in Ice-Augers | auger bits | |
| 629,539 | Jul. 25, 1899 | J. Bertram | Boring and excavating implement | ||
| 1,013,823 | Jan. 02, 1912 | E.H. Sheldon | Ice cutting or shaving device | ||