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| Patents for Paul W. Griffin | |||||
| Number | Date | Patentee | Title | Type | |
| 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 | ||