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| All Patents in class 92/258 | |||||
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| Number | Date | Patentee | Title | Type | |
| 138,690 | May 06, 1873 | C.E. Perkins | Improvement in piston-packings | piston ring and packing | |
| 305,467 | Sep. 23, 1884 | P. Murray, Jr. | Gas Engine | gas and gasoline engines | |
| 1,924,545 | Aug. 29, 1933 | W.H. Fitzgerald, R.P. Fitzgerald | Drop hammer | drop hammers | |
| 2,567,641 | Sep. 11, 1951 | M.W. Hazelton | Hydraulic work hold-down or clamp | hydraulic apparatus | |