Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4997028 | Rotary heat exchanger with segmented seals | — | 1991-03-05 |
| 4791980 | Sealing arrangement for air preheater | Donald K. Hagar, Curtis Kennedy | 1988-12-20 |
| 4673026 | Sealing arrangement for air preheater | Donald K. Hagar, Curtis Kennedy | 1987-06-16 |