| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for William A. Clark | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| RE3,516 | Jun. 22, 1869 | W.A. Clark | Improvement in expansive bits | adjustable drill bits | |
| RE3,733 | Nov. 16, 1869 | W.A. Clark | Improvement in expansive bits | adjustable drill bits | |
| RE4,668 | Dec. 12, 1871 | W.A. Clark | Improvement in expansive bits | adjustable drill bits | |