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| All Patents in class 173/16 | |||||
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| Number | Date | Patentee | Title | Type | |
| 803,621 | Nov. 07, 1905 | A.J. Patch | Pneumatic Hammer | pneumatic tools | |
| 836,778 | Nov. 27, 1906 | A.J. Patch | Pneumatic Hammer | pneumatic tools | |