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| Patents for William A. Clark | |||||
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| Number | Date | Patentee | Title | Type | |
| 139,769 | Jun. 10, 1873 | W.A. Clark | Improvement in Ice-Augers | auger bits | |
| 141,324 | Jul. 29, 1873 | W.A. Clark | Improvement in Expansive Bits | adjustable drill bits | |
| CA-642,949 | Jun. 12, 1962 | W.A. Clark | Rubber Mixer | mixing machines | |
| 3,041,659 | Jul. 03, 1962 | W.A. Clark | Rubber Mixer | mixing machines | |