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| All Patents in class 175/398 | |||||
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| Number | Date | Patentee | Title | Type | |
| RX-57 | Oct. 20, 1843 | L. Disbrow | Imrpovement in apparatus for boring earth for water | ||
| 224,530 | Feb. 17, 1880 | W. Hasenzahl | Boring Tool for Stone Working | stoneworking | |
| 627,659 | Jun. 27, 1899 | F.B. Spry | Expanding Auger | auger bits | |
| 2,088,197 | Jul. 27, 1937 | C.L. Gairoard | Brick and Stone Drill | stone boring and drilling machines | |
| 2,919,902 | Jan. 05, 1960 | M.J. Steffes | Masonry drill | ||