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| All Patents in class 403/292 | |||||
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| Number | Date | Patentee | Title | Type | |
| 297,153 | Apr. 22, 1884 | A. Muir | Coupling Shafting | industrial machine shaft couplings | |
| 869,055 | Oct. 22, 1907 | B.S. Burroughs | Splice and joint | ||
| 1,447,725 | Mar. 06, 1923 | G.L. Kelley | Means for connecting the parts of structures | ||