Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4906672 | Blowing agents for polyurethane foam | Herman Stone, Steve Lichvar, Richard B. Rupp, Elmer Minnich | 1990-03-06 |
| 4826882 | Open celled polyurethane foams | Richard B. Rupp | 1989-05-02 |