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| Patents Granted on 1968-09-10 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,400,493 | Sep. 10, 1968 | W.C. Keyes | Belt sanding and polishing machine | sanding machines | |
| 3,400,751 | Sep. 10, 1968 | D.A. Behnke | Method of treating cores | ||
| 3,400,881 | Sep. 10, 1968 | G.N. Levesque | Compressed Air Economizer for Fluidic Controls | ||