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| All Patents in class 60/407 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,400,881 | Sep. 10, 1968 | G.N. Levesque | Compressed Air Economizer for Fluidic Controls | ||
| 4,404,799 | Sep. 20, 1983 | E.C. Dudek | Pneumatic tool with muffler | ||
| 5,309,714 | May 10, 1994 | K.C. Happ, G.A. Putney | Ratchet Tool with Exhaust Chamber Manifold with Sound Dampening Properties | ||