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| All Patents in class 403/330 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 78,652 | Jun. 09, 1868 | J.W. Craig | Improvement in braces for bits | |
 | 139,174 | May 20, 1873 | F.H. Merrill | Improved Pipe Tongs | |
| 1,253,511 | Jan. 15, 1918 | J.C. Moler | Coal Drill Socket Retaining Apparatus | ||
| 1,954,048 | Apr. 10, 1934 | S.C. Moon, R.K. Jeffery | Tool Holder | ||