Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5830817 | Accelerator combinations | Hans-Joachim Graf, Volker Schafer, Erich Schmidt, Hans-Martin Issel, Hans-Dieter Voss +2 more | 1998-11-03 |
| 5565599 | Stabilised dithiophosphoric acid polysulphides | Hans-Joachim Graf, Lothar Steger, Klaus Kn orr, Volker Sch afer, Thomas Scholl +2 more | 1996-10-15 |