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| All Patents in class 384/477 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,582,525 | Jan. 15, 1952 | S.S. Brown | Seal for motor shaft with permanently lubricated bearings | electric motors | |
| 2,638,887 | May 19, 1953 | G. Eaton | Grinding wheel dresser | grinder dressers | |
| 3,019,066 | Jan. 30, 1962 | J. Decker | Machine Tool Spindle Construction | grinding machines | |