| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for Edward Helb | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 764,809 | Jul. 12, 1904 | E. Helb | The American Combined Level and Grade Finder | inclinometers | |
| CA-90,643 | Dec. 20, 1904 | E. Helb | Level and grade finders | inclinometers | |