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| All Patents in class 72/81 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 97,234 | Nov. 23, 1869 | F.J. Seymour | Spinning Sheet Metal Tubes | ||
| 240,145 | Apr. 12, 1881 | C.F. Weber, F. Baier, I.F. Kearns | Spinning Lathe | ||
| 3,104,565 | Sep. 24, 1963 | C.L. Sporck | Metal Working | ||
| 3,120,207 | Feb. 04, 1964 | C.L. Sporck | Metal Working | ||
| 3,220,236 | Nov. 30, 1965 | P.R. Bohart, G.A. Storch | Indexing Mechanism or a Machine Tool | ||