| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for On-The-Dot Level Device | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 1,281,096 | Oct. 08, 1918 | C.F. Thullen | Level device | levels | |
| CA-196,597 | Jan. 27, 1920 | C.F. Thullen | Level device | levels | |
| 1,393,328 | Oct. 11, 1921 | C.F. Thullen | Level device | levels | |
| CA-213,997 | Oct. 25, 1921 | C.F. Thullen | Level device | levels | |