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| All Patents in class 112/256 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 557,496 | Mar. 31, 1896 | J.F. Duryea | Engine or Motor | ||
| 1,797,547 | Mar. 24, 1931 | G.M. Class | Lubricating Device for the Ways of Lathes | ||