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| Patents for Richard A. Williams | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,639,155 | Aug. 16, 1927 | W.L. Bigsby, R.A. Williams | Sander drum | sanding machines | |
| 1,922,905 | Aug. 15, 1933 | R.A. Williams | Sander drum | sanding machines | |
| 1,928,637 | Oct. 03, 1933 | R.A. Williams | Brake for woodworking machines | sanding machines | |