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| All Patents in class 285/417 | |||||
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| Number | Date | Patentee | Title | Type | |
| 174,177 | Feb. 29, 1876 | H. Albrecht | Improvement in shaft-couplings | industrial machine shaft couplings | |
| 319,144 | Jun. 02, 1885 | N. Stephens, M.L. Ritchie | Method of utilizing old boiler-tubes | ||