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| All Patents in class 74/721 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 299,233 | May 27, 1884 | W.J. Liddell | Circular-saw mill | |
| 408,233 | Aug. 06, 1889 | W.W. Griscom | Vehicle Motor | ||
 | 421,417 | Feb. 18, 1890 | J.H. Mickler | Three Spindle Boring Machine | |
 | 463,790 | Nov. 24, 1891 | A.D. Quint | Drilling-machine | |
| 495,182 | Apr. 11, 1893 | I.C. Gray | Traction Engine | ||
| 556,346 | Mar. 17, 1896 | S.B. Gray | Traction Engine | ||
| 608,517 | Aug. 02, 1898 | S.B. Gray | Traction Engine | ||
 | 673,102 | Apr. 30, 1901 | W.O. Vivarttas | Power driving mechanism | |