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| All Patents in class 74/438 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 145,398 | Dec. 09, 1873 | E. Coapman | Improvement in machines for bending hoops | |
| 305,648 | Sep. 23, 1884 | B.D. Whitney | Gearing | ||
 | 343,352 | Jun. 08, 1886 | B.D. Whitney | Gearing | |
| 610,319 | Sep. 06, 1898 | J.W. Brown, Jr. | Double Turret Lathe | ||