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| Patents for Orville T. Chamberlain | |||||
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| Number | Date | Patentee | Title | Type | |
| 256,448 | Apr. 11, 1882 | A.J. Signor | Die Stock | tap wrenches and die stocks | |
| 389,400 | Sep. 11, 1888 | E.C. Mead | Wrench | screw adjust wrenches | |
| 445,185 | Jan. 27, 1891 | E.C. Mead | Wrench | ratchet wrenches | |