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| All Patents in class 72/216 | |||||
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| Number | Date | Patentee | Title | Type | |
| 220,074 | Sep. 30, 1879 | J.D. Landram, H.S. Haskins | Improvement in devices for bending hooks | ||
| 357,606 | Feb. 15, 1887 | W. Kent | Machine for Beding and Flanging Sheet Metal | ||
| 3,555,870 | Jan. 19, 1971 | A.F. Tremblay | Gear Forming | gear making machines | |