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| Patents for H. P. Gregory | |||||
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| Number | Date | Patentee | Title | Type | |
| 331,730 | Dec. 01, 1885 | G.V. Orton | Planing-machine | wood planers | |
| AU-1,951,001,816 | Jan. 17, 1952 | H.P. Gregory | Improved means for raising and lowering the work-supporting tables of metalworking, woodworking andother machines | wood planers | |