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| Patents for P. H. T. Mason | |||||
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| Number | Date | Patentee | Title | Type | |
| 395,051 | Dec. 25, 1888 | H.P. Heacock | Saw-mill | sawmill feed works | |
| 404,002 | May 28, 1889 | H.P. Heacock | Saw-mill | sawmill feed works | |
| 410,572 | Sep. 10, 1889 | E. Benjamin | Molding-cutter | cutters | |
| 411,975 | Oct. 01, 1889 | E. Benjamin | Resawing-machine | circular resaws | |
| 413,163 | Oct. 22, 1889 | E. Benjamin | Planing-machine | wood planers | |
| 416,549 | Dec. 03, 1889 | E. Benjamin | Feed-works for wood-working machines | woodworking machine stockfeeding mechanisms | |