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| Patents for H. J. Burnham | |||||
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| Number | Date | Patentee | Title | Type | |
| 296,242 | Apr. 01, 1884 | W. Steers | Extension-bit | auger bits | |
| 950,782 | Mar. 01, 1910 | A.B. Jennings | Expansible bit | auger bits | |