Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4940554 | Conditioning agent for the treatment of base materials | Hans-Joachim Grapentin, Detlef Tessmann | 1990-07-10 |
| 4929422 | Process for the adhesive metallization of synthetic materials | Hartmut Mahlkow, Michael C. Romer, Gunther Rosskamp, Ludwig Stein, Waltraud Strache | 1990-05-29 |
| 4781990 | Conditioning agent for the treatment of base materials | Hans-Joachim Grapentin, Detlef Tessmann | 1988-11-01 |
| 4675050 | Sulfate and sulfonate beta-naphthol polyglycol ethers | Gunter Voss | 1987-06-23 |