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| All Patents in class 269/112 | |||||
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| Number | Date | Patentee | Title | Type | |
| 604,160 | May 17, 1898 | F. Reissman | Frame Clamp and Support | miter and corner clamps | |
| 840,777 | Jan. 08, 1907 | C.W. Lawson | Frame-clamp | miter and corner clamps | |
| 1,342,891 | Jun. 08, 1920 | O. Bergstrom | Quick-acting frame-clamping machine | miter and corner clamps | |
| 2,623,560 | Dec. 30, 1952 | A.H. Joseph | Polygonal framework type clamping machine | clamps | |