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| All Patents in class 451/180 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,256,646 | Feb. 19, 1918 | C.J. Barry | Grinding and Polishing Machine | polishing and buffing machinery | |
| 1,295,359 | Feb. 25, 1919 | N.G. Olson | Electrically-operated abrading-machine | oscillating spindle sanders | |
| 2,195,493 | Apr. 02, 1940 | E.M. McGovern, P. Schrick | Crankshaft grinder | crankshaft maintenance | |
| 2,448,245 | Aug. 31, 1948 | H.F. Bakewell | Grinding fixture | tool grinders | |