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| All Patents in class 16/215 | |||||
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| Number | Date | Patentee | Title | Type | |
| 201,749 | Mar. 26, 1878 | W.H. Kesler, E.H. Clarkson | Improvement in sash-pulleys | door and window hardware | |
| RE8,586 | Feb. 18, 1879 | E.H. Clarkson, W.H. Kesler | Improvement in sash-cord guides | ||
| 472,074 | Apr. 05, 1892 | F.V. Phillips | Sash-pulley | door and window hardware | |
| 827,618 | Jul. 31, 1906 | F.S. Clarkson | Sash-pulley | ||