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| All Patents in class 474/129 | |||||
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| Number | Date | Patentee | Title | Type | |
| 234,563 | Nov. 16, 1880 | B.H. Hadley | Belt Shipper | industrial machine pulleys and belt drive mechanisms | |
| 313,035 | Feb. 24, 1885 | W.G. Vernon | Belt-shifter | bandsaws | |
| 371,480 | Oct. 11, 1887 | F.A. Shoemaker | Belt-shifter | industrial machine pulleys and belt drive mechanisms | |
| 964,051 | Jul. 12, 1910 | H.A. Perkins | Belt shifter and tightener | woodworking power transmission | |
| 2,499,273 | Feb. 28, 1950 | M. Leach | Belt shifter | belt shifters | |