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| All Patents in class 173/104 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,043,442 | Jun. 09, 1936 | J.E. McNeil | Tool Holder | tool holders | |
| 2,185,471 | Jan. 02, 1940 | A.W. Mall | Power hammer | ||
| 3,054,464 | Sep. 18, 1962 | E.J. Ondeck | Electric Hammer | handheld power tools | |