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| All Patents in class 91/298 | |||||
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| Number | Date | Patentee | Title | Type | |
| 530,934 | Dec. 18, 1894 | D. Drawbaugh | Pneumatic tool | ||
| 665,033 | Jan. 01, 1901 | C.B. Richards | Pneumatic Tool | pneumatic tools | |
| 745,239 | Nov. 24, 1903 | C.B. Richards | Pneumatic Tool | pneumatic tools | |
| 794,738 | Jul. 18, 1905 | C.K. Pickles | Fluid-Pressure Impact Tool | pneumatic tools | |
| 836,778 | Nov. 27, 1906 | A.J. Patch | Pneumatic Hammer | pneumatic tools | |