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| Patents for M. C. Hillyard | |||||
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| Number | Date | Patentee | Title | Type | |
| 460,403 | Sep. 29, 1891 | W.H. Rogers | Nut Wrench | quick adjust wrenches | |
| 481,598 | Aug. 30, 1892 | W.X. Stevens | Rock-drilling machine | impact chisels and drills | |
| 483,795 | Oct. 04, 1892 | W.X. Stevens | Faucet | faucets | |
| 507,587 | Oct. 31, 1893 | T.C. Lippitt | Nut Wrench | screw adjust wrenches | |