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| Patents for James Gregg | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,507X | May 07, 1811 | J. Gregg | Mode of manufacturing brick (pug mill) | brick maker | |
| 3,320X | Mar. 30, 1821 | J. Gregg | Machine for threshing and cleaning grain | miller | |
| 29,602 | Aug. 14, 1860 | W. Kenyon | Gas-pipe cutter | metal lathe accessories and attachments | |