Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4472089 | Channel construction machinery having a levelling and material lining application attachment | Egon Bruderle | 1984-09-18 |
| 4432672 | Canal building apparatus | Egon Bruderle | 1984-02-21 |