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| Patents for R-O Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,413,436 | Dec. 31, 1946 | O.W. Dawson | Grinding Machine | |
 | CA-449,732 | Jul. 13, 1948 | O.W. Dawson | Grinding machine | |
 | 2,595,093 | Apr. 29, 1952 | G.H. Mouw | Tool grinding fixture | |
 | 2,752,740 | Jul. 03, 1956 | G.H. Mouw | Form relieving fixture | |
 | 2,764,855 | Oct. 02, 1956 | O.W. Dawson | Fixture for positioning tool relative to grinding head | |
 | 2,911,770 | Nov. 10, 1959 | O.W. Dawson | Fixture for positioning tool relative to grinding head | |