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| All Patents in class 474/119 | |||||
| Number | Date | Patentee | Title | Type | |
| 402,758 | May 07, 1889 | P. Medart | Belt Shiifter | industrial machine pulleys and belt drive mechanisms | |
| 1,188,810 | Jun. 27, 1916 | H.J. Mitchell | Belt-tighteners | industrial machine pulleys and belt drive mechanisms | |