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| All Patents in class 29/889.6 | |||||
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| Number | Date | Patentee | Title | Type | |
| 12,317 | Jan. 23, 1855 | B. Holly, W. Race | Carriage-wheel | carriage wheels | |
| 2,450,660 | Oct. 05, 1948 | G.W. Hardy | Method of Forming Propeller Hubs | aircraft | |
| 2,496,169 | Jan. 31, 1950 | E. Lochman | Variable pitch propeller | ||
| 2,828,531 | Apr. 01, 1958 | C.J. Bath | Method of Making a Helicopter Blade | manufacturing processes | |