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| Patents Granted on 1971-03-16 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,570,190 | Mar. 16, 1971 | R.D. Rutt | Belt sanding and polishing machine | sanding machines | |
| 3,570,296 | Mar. 16, 1971 | J.R. Buta | Automatic spacer blocks for rolling mill work roll chocks | rolling mills | |