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| All Patents in class 86/51 | |||||
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| Number | Date | Patentee | Title | Type | |
| 501,547 | Jul. 18, 1893 | E. Thomson | Shaping and Spinning Metals by Electricity | electrical discharge machining | |
| 582,472 | May 11, 1897 | P. Hesse | Means for Producing Tubes by Rolling | tube making machines | |
| 669,103 | Mar. 05, 1901 | C.D. Rice | Forging Machine | forging apparatus and accessories | |
| 2,353,008 | Jul. 04, 1944 | H.A. Bondeson | Applying metal bands to articles of manufacture | projectile shells | |