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| All Patents in class 384/391 | |||||
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| Number | Date | Patentee | Title | Type | |
| 79,634 | Jul. 07, 1868 | E.S. Capen | Improvement in loose pulleys | industrial machine pulleys and belt drive mechanisms | |
| 147,910 | Feb. 24, 1874 | W. Dame | Self-Lubricating Pulleys | industrial machine pulleys and belt drive mechanisms | |
| 606,908 | Jul. 05, 1898 | H.F. Arnold | Pulley | ||
| 632,849 | Sep. 12, 1899 | W. Sellers, E.M. Putnam | Trolley Wheel | electric railroads | |