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| All Patents in class 192/58.92 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,169,747 | Aug. 15, 1939 | R.B. Treer | Power press | metalworking presses | |
| 3,214,940 | Nov. 02, 1965 | L. Kramer | Pneumatic impact wrench | ||
| 3,214,941 | Nov. 02, 1965 | R.E. Shulters | Pneumatic impact wrench | ||
| 3,263,449 | Aug. 02, 1966 | L. Kramer | Pneumatic impact wrench | ||