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| All Patents in class 92/140 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,802,323 | Apr. 09, 1974 | S. W | Piston and piston rod assembly for hydraulic jack | hydraulic jacks | |
| 5,335,586 | Aug. 09, 1994 | R.J. Mathieu, J.A. Batten, M.R. Casto | Handle Linkage | tool handles | |