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| All Patents in class 91/225 | |||||
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| Number | Date | Patentee | Title | Type | |
| 181,386 | Aug. 22, 1876 | E.S. Winchester | Rock Drilling Machine | stone boring and drilling machines | |
| 284,173 | Sep. 04, 1883 | B. Brazelle | Direct-acting engine | pneumatic tools | |
| 504,803 | Sep. 12, 1893 | D. Drawbaugh | Pneumatic tool | ||
| 2,782,651 | Feb. 26, 1957 | N.V. Gusching, B. Sassen | Hydraulic Jogger | hydraulic apparatus | |