Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4515547 | Apparatus for the manufacture of conical hollow poles of fiber reinforced synthetic resin | Hartmut Trommen | 1985-05-07 |
| 4436781 | Centrifugally cast pole comprised of a reinforced resin for supporting a light or the like upon an end thereof | Hartmut Trommen | 1984-03-13 |
| 4405398 | Process for fastening a base plate to a pole prepared by centrifugal casting | Hartmut Trommen | 1983-09-20 |
| 4383965 | Centrifugal process for the production of a pipe-shaped body and a pipe-shaped body produced according to the centrifugal process | Hartmut Trommen | 1983-05-17 |