| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 173/138 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 2,919,901 | Jan. 05, 1960 | R.L. Sandvig | Drill system with suction | ||
| 3,003,773 | Oct. 10, 1961 | G.H. Fuehrer | Coupling assembly with positive lock | ||
| 3,010,730 | Nov. 28, 1961 | G.H. Fuehrer | Coupling with lock | ||