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| All Patents in class 173/219 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,016,725 | Oct. 08, 1935 | W.W. Price, C.W. Ripsch | Abrasive machine | ||
 | 4,404,799 | Sep. 20, 1983 | E.C. Dudek | Pneumatic tool with muffler | |
| 5,309,714 | May 10, 1994 | G.A. Putney, K.C. Happ | Ratchet Tool with Exhaust Chamber Manifold with Sound Dampening Properties | ||
| 6,062,323 | May 16, 2000 | J.M. Beer, J.R. Brehm, D.S. Pusateri | Pneumatic Tool with Increased Power Capability | ||