| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 175/291 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 63,842 | Apr. 16, 1867 | C. Boernicke | Improvement in Wood-Boring Bits | drill bits | |
| 521,430 | Jun. 12, 1894 | A.A. Bourgeous | Boring-bit | drill bits | |