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| Patents Granted on 1975-10-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,913,277 | Oct. 21, 1975 | R.P. Lindsay, R.S. Hahn | Grinding Machine | grinding machines | |
| 3,913,436 | Oct. 21, 1975 | M. Orescan | Band saw machine | bandsaws | |
| 3,913,450 | Oct. 21, 1975 | R. MacGregor | Hydraulic control system for press brakes or the like | sheet metal brakes | |
| 3,913,451 | Oct. 21, 1975 | D.I. McDonald | Hydraulic Cylinder with Cushioning Means | hydraulic apparatus | |