Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693451 | Recording material for images or data | Alexa Sommer, Udo Herrmann, Robert Bloodworth, Gunther Penners | 1997-12-02 |
| 5607990 | Method for making phenol-formaldehyde resins flame-resistant | Karlheinz Dorn, Klaus Frankenfeld, Hans-Dieter N agerl | 1997-03-04 |