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| Patents for William Gregg | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,895 | Dec. 10, 1840 | M. Gregg | Machine for cutting round tenons and for cutting or turning other articles of wood into a cylindrical form | hollow bits | |
| 19,292 | Feb. 09, 1858 | M. Gregg | Machine for cutting tenons on spokes | tenoning machines | |
| 68,517 | Sep. 03, 1867 | G.C. Lathrop | Improvement in sawing machines | drag saws | |
| 274,591 | Mar. 27, 1883 | W. Gregg | Device for Handling Fruit Cans | jar wrenches | |