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| Patents for J. M. Caldwell | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 278,773 | Jun. 05, 1883 | J.J. Burk | Hoop coiling and nailing machine | |
| 282,525 | Aug. 07, 1883 | F.J. Illig, P.J. Illig | Double Seaming Machine | ||
 | 288,748 | Nov. 20, 1883 | J. Watson | Bit-brace | |
 | 292,817 | Feb. 05, 1884 | E. Holmes, B. Holmes | Windlass for Compressing Barrels | |
 | 297,401 | Apr. 22, 1884 | E. Holmes, B. Holmes | Stave-bending machine | |
 | 512,704 | Jan. 16, 1894 | B. Holmes, E. Holmes | Device for Directing Hoops on Barrels | |