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