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| All Patents in class 74/369 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 266,456 | Oct. 24, 1882 | A.O. Frick | Traction Engine | ||
 | 626,933 | Jun. 13, 1899 | J. Reid | Apparatus for Drilling Wells | |
 | 809,372 | Jan. 09, 1906 | E.A. Hoefer | Variable-speed gear | |
| 818,114 | Apr. 17, 1906 | H.W. Oster | Gearing for thread-cutting machines | ||