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All Patents in class 91/320 | |||||
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Number | Date | Patentee | Title | Type | |
472,495 | Apr. 05, 1892 | D. Drawbaugh | Pneumatic tool | ||
3,232,176 | Feb. 01, 1966 | L.A. Wagnon, R.E. Shulters, L. Kramer, J.C. Hearning | Percussion tool |