Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700024 | Signal and current transmission system with transducers spaced by the collector lines | Heinz Hasselmann, Heinz Pfannkuche | 1987-10-13 |
| 4500969 | Method and apparatus for determining stress on hoisting equipment | Heinz Hasselmann | 1985-02-19 |