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| All Patents in class 451/160 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,881,569 | Apr. 14, 1959 | H.B. Van Auken, J.J. Strnad | Grinding machine | gasket surface maintenance | |
| 4,547,996 | Oct. 22, 1985 | D.A. Winski | Jig Grinder With Automatic C-Axis Feedrate Control | jig grinders | |
| 4,833,831 | May 30, 1989 | W.T. Armstrong, Jr. | Apparatus and Method for Sizing and Finishing Fixed Jaw Openings of Open-Ended Wrenches | wrench components | |