Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4671799 | Dye mixtures for paper stock | Hans-Juergen Degen | 1987-06-09 |
| 4393207 | Alkoxyalkylaminotriazine trans-etherification products | Rainer Hummerich, Wolfram Weiss, Franz Merger, Guenther Immel, Karl-Clemens Peters | 1983-07-12 |
| 4347054 | Orthodontic expansion screw | Berthold Walter | 1982-08-31 |
| 4184254 | Process of electro-eroding channels in multiple buccal tube device | — | 1980-01-22 |