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| Patents for Central Machine Works Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,601,793 | Oct. 05, 1926 | H.E. Cullen | Brick-molding machine | manufacturing bricks and tiles | |
| 3,300,209 | Jan. 24, 1967 | C. Friis | Spring controlled and cushioned springboard devices | ||