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| All Patents in class 292/169.21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,910X | Jun. 19, 1835 | J.G. Hotchkiss | Lock, mortise, and latch | household tools | |
| 9,491X | Mar. 12, 1836 | A. Conant | Door locks | ||
| 582,565 | May 11, 1897 | H.M. Whitcomb | Latch | ||
| 782,091 | Feb. 07, 1905 | S.J. Morgan, H.M. Whitcomb | Latch | ||