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| All Patents in class 173/109 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 3,269,466 | Aug. 30, 1966 | W.G. Mitchell | Impact tool | |
| 3,363,700 | Jan. 16, 1968 | F.C. Bogusch, Jr. | Rotary and hammer drill | ||
| 6,158,526 | Dec. 12, 2000 | R.D. DeRome, P.W. Griffin, A.P. Ghode | Reversible Impact Mechanism with Structure Limiting Hammer Travel | ||
| 6,227,308 | May 08, 2001 | R.D. DeRome, P.W. Griffin, A.P. Ghode | Reversible Impact Mechanism with Structure Limiting Hammer Travel | ||