Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5162080 | Rotary flow control valve | Michael E. Drager, Edward J. Tischer | 1992-11-10 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5162080 | Rotary flow control valve | Michael E. Drager, Edward J. Tischer | 1992-11-10 |