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| Patents for William H. Hoffman | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 154,455 | Aug. 25, 1874 | W.H. Hoffman, J.C. Chapman | Improvement in self-oiling journal-boxes and hangers | |
 | 164,560 | Jun. 15, 1875 | W.H. Hoffman | Improvement in mechanisms for adjusting lathe-beds to different heights | |
| 164,561 | Jun. 15, 1875 | W.H. Hoffman | Tool Receptables for Metal Working Machines | ||
| 409,464 | Aug. 20, 1889 | A.E. Hoffman | Feed mechanism for saw-mill carriages | ||