Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5100701 | Solder-repelling coating for tools | Helmut Freller, Hans Lorenz, Peter Schack | 1992-03-31 |
| 4508430 | Electrochromic display cell I | Helmut Freller, Hans Lorenz, Konrad Mund | 1985-04-02 |