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| All Patents in class 24/43 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 29,727 | Aug. 21, 1860 | H.D. Stover | Improved shaping and molding machine | |
| 1,906,263 | May 02, 1933 | E.A. Hall | Valve Seat Grinder | ||