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| Patents for Otto Hufeland | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 181,258 | Aug. 22, 1876 | F.A. Gleason | Improvement in nail-plate feeders | |
 | 184,158 | Nov. 07, 1876 | H.W. Kip | Method of Making Hammers | |
 | 188,133 | Mar. 06, 1877 | J. Hellwig | Bolt and Rivet Cutter | |
 | 191,493 | May 29, 1877 | A.V. Trust | Wrench | |
 | 266,761 | Oct. 31, 1882 | F. Brown | Friction Clutch | |
 | 326,876 | Sep. 22, 1885 | A. Eikhoff, L. Kramer | Ratchet-Wrench | |
 | 350,819 | Oct. 12, 1886 | E. Enge | Work Bench | |
 | 356,986 | Feb. 01, 1887 | J. Clark | Pipe Wrench | |