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| Patents for William H. Richards | |||||
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| Number | Date | Patentee | Title | Type | |
| 125,759 | Apr. 16, 1872 | W.H. Richards | Center-Bit Style Countersink | countersinks | |
| 197,896 | Dec. 04, 1877 | W.H. Richards | Improvement in ratchet-drills | ratchet drills | |
| 231,361 | Aug. 17, 1880 | W.H. Richards | Ratchet Drill | ratchet drills | |