| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 411/180 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 1,327,934 | Jan. 13, 1920 | F.T. Acock | Tool Holder | tool holders | |
| 1,934,232 | Nov. 07, 1933 | A.W. Keuffel | Slide rule | slide rules | |