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| All Patents in class 83/691 | |||||
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| Number | Date | Patentee | Title | Type | |
| 676,782 | Jun. 18, 1901 | E.B. Stimpson | Mechanism for oblique punching | shoe and boot making machines | |
| 3,063,319 | Nov. 13, 1962 | E.M. Johnson | Machine punch having ejector pin retaining means | tool and die maker | |