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| Patents for Grinding & Polishing Machinery Co. | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 2,637,147 | May 05, 1953 | J.N. Clyne | Buffing machine | |
![]() | 4,369,606 | Jan. 25, 1983 | R.E. Reiman | Abrasive head | |