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| Patents for P. C. Masi | |||||
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| Picture | Number | Date | Patentee | Title | |
 | RE4,764 | Feb. 20, 1872 | D. Lane | Improvement in head-blocks for saw-mills | |
 | 310,960 | Jan. 20, 1885 | J.L. Phillips | Wrench | |
 | 354,079 | Dec. 07, 1886 | A.L. Zuck | Wrench For Twisting Wires | |
 | 354,197 | Dec. 14, 1886 | J. Leib | Pipe Wrench | |
 | 370,668 | Sep. 27, 1887 | C.H. Westcott | Ruler | |
 | 370,752 | Sep. 27, 1887 | J.H. Guiley | Pipe Wrench | |