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| All Patents in class 451/520 | |||||
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| Number | Date | Patentee | Title | Type | |
| 337,515 | Mar. 09, 1886 | S.I. Phelps | Molding-polisher | sanding machines | |
| 346,680 | Aug. 03, 1886 | J.L. Perry | Sand-paper cylinder | sanding machines | |
| 399,629 | Mar. 12, 1889 | J.L. Perry | Polishing-cylinder | sanding machines | |
| 1,988,361 | Jan. 15, 1935 | A.L. Pearson | Sanding wheel | sanding machines | |
| 2,167,573 | Jul. 25, 1939 | C. Jones | Sanding wheel head | sanding machines | |