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| Patents for Diamond Emery Wheel & Machine Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 94,955 | Sep. 21, 1869 | R.J. Costain, N.B. Hadley | Improved compound for emery-wheels and oil-stones | ||
| 314,574 | Mar. 31, 1885 | B.H. Hadley | Drilling-lathe | wood lathes | |