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| Patents Granted on 1838-03-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 627 | Mar. 10, 1838 | E. L'Hommedieu | Wood auger | gimlets | |
| 635 | Mar. 17, 1838 | J. Wing | Machine for sawing eaves-troughs for conducting water from buildings, &c., applicable to other purposes | circular saws | |
| 636 | Mar. 17, 1838 | S. Merrick | Punch | leather punches | |
| 660 | Mar. 28, 1838 | D. Hutchins, N. Millington, E. Waste | Machine to Set Saw Teeth | saw sets | |