Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880864 | Thermoplastic polycarbonates and blends with enhanced flame retardant properties | Winfried Paul, Sivaram Krishnan | 1989-11-14 |
| 4828921 | Polycarbonate molding compositions | Mark W. Witman, Sivaram Krishnan, Wolfgang Siebourg | 1989-05-09 |