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| All Patents in class 118/206 | |||||
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| Number | Date | Patentee | Title | Type | |
| 284,650 | Sep. 11, 1883 | J.H. Mitchell | Machinery for the manufacture of matches | match making machines | |
| 1,854,071 | Apr. 12, 1932 | E.C. Schacht | Method of manufacturing abrasives | ||
| 2,245,301 | Jun. 10, 1941 | E.C. Schacht | Manufacture of abrasive articles | ||