Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876033 | Moulded bodies containing carbon | Dieter Freitag, Werner Waldenrath, Claus Burkhardt, Bernhard Schulte | 1989-10-24 |
| 4859263 | Process for the manufacture of printed circuits | Hans-Leo Weber, Dieter Freitag, Werner Waldenrath | 1989-08-22 |