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| All Patents in class 492/42 | |||||
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| Number | Date | Patentee | Title | Type | |
| 459,325 | Sep. 08, 1891 | B.D. Whitney | Feed-roller | wood planers | |
| 2,280,620 | Apr. 21, 1942 | F.J. Theler, G.W. Binns | Apparatus for Finishing Tubular Articles | grinding machines | |
| 2,377,880 | Jun. 12, 1945 | R.S. Gutsell | Centrifugal abrasive-sheet holding wheel | grinding wheels | |