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| Patents for Henry Houghton | |||||
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| Number | Date | Patentee | Title | Type | |
| 558,874 | Apr. 21, 1896 | J. Grannis | Axle Nut Wrench | axle nut wrenches | |
| 559,559 | May 05, 1896 | J.E. Worthen | Circumferential Dividers | dividers | |
| 605,441 | Jun. 07, 1898 | A.E. Brockett | Pipe Wrench | pipe wrenches | |