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| All Patents in class 92/111 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,348,256 | Aug. 03, 1920 | F.L. Wadsworth | Steam Engine | ||
 | 1,575,968 | Mar. 09, 1926 | W.L. Bryant | Grinding machine | |
| 1,940,142 | Dec. 19, 1933 | R.W. Ott | Milling Machine | ||
| 2,840,956 | Jul. 01, 1958 | C.M. Grinage | Grinding Machine | ||