| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 173/144 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 91,117 | Jun. 08, 1869 | N.B. Hadley | Improvement in machines for threading screws | screw machines | |
| 1,272,345 | Jul. 09, 1918 | J. Beaudry | Drilling Machine | ||