| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 76/108.2 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 627,659 | Jun. 27, 1899 | F.B. Spry | Expanding Auger | auger bits | |
| 1,881,535 | Oct. 11, 1932 | J.M. Hargrave | Rock drill bit | drill bits | |