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| All Patents in class 188/180 | |||||
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| Number | Date | Patentee | Title | Type | |
| 445,178 | Jan. 27, 1891 | D.S. Henrie | Governor | machine governors | |
| 2,433,007 | Dec. 23, 1947 | C.S. Weyandt | Internal-combustion percussion tool | gas and gasoline engines | |
| 3,520,228 | Jul. 14, 1970 | J.A. Wohfeil | Spindle Orienting and Drawbolt Malfunction Sensing Machine Tool Control System | machine tool controls | |