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| All Patents in class 384/271 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,386,283 | Oct. 09, 1945 | E.A. Reibig, C.A. Wiken | Machine tool | surface grinders | |
| 2,397,178 | Mar. 26, 1946 | C.A. Wiken, E.A. Reibig | Surface grinder | surface grinders | |
| 3,106,432 | Oct. 08, 1963 | H.B. Opferkuch | Adjustable Journal Bearing with Automatic Heat Compensator | metalworking machine bearings | |
| 3,115,796 | Dec. 31, 1963 | E.P. Bullard, III, E.P. Bullard, IV | Bearing | ||