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| All Patents in class 292/306 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,650,011 | Nov. 22, 1927 | E.R. Draver | Frictional window-sash holder | ||
| 1,702,819 | Feb. 19, 1929 | E.R. Draver | Window-sash holder | ||