| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for Precision Tool Co. | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 1,361,686 | Dec. 07, 1920 | M.C. Conwell | Tool | boring heads | |
| 1,962,951 | Jun. 12, 1934 | M.C. Conwell | Tool Head | boring heads | |