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| Patents for Watertown Machine Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 346,680 | Aug. 03, 1886 | J.L. Perry | Sand-paper cylinder | sanding machines | |
| 346,681 | Aug. 03, 1886 | J.L. Perry | Abrading-cylinder | sanding machines | |
| 347,125 | Aug. 10, 1886 | J.L. Perry | Sanding machine | sanding machines | |
| 425,486 | Apr. 15, 1890 | J.B. Bennett | Adjusting device | sanding machines | |