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| Patents for P. M. Hulbert | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 383,334 | May 22, 1888 | J.D. Abbott | Improvements in Vise-Wrenches | |
| 397,114 | Feb. 05, 1889 | N.H. Dolsen | Machine for removing bark from trees | ||
 | 405,310 | Jun. 18, 1889 | J. Harley | Saw-table gage | |
 | CA-32,878 | Nov. 20, 1889 | J.W. Adams | Pipe Wrench | |
 | 439,388 | Oct. 28, 1890 | E.S. Cushman | Wrench | |
 | 439,919 | Nov. 04, 1890 | N.M. Willet | Wrench | |
 | 453,820 | Jun. 09, 1891 | C.E. Pickens | Wrench | |