Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6263911 | Fluid flow control valve | Joseph P. Brown, Edward M. Norum | 2001-07-24 |
| 6263912 | Fluid flow control valve | Joseph P. Brown, Edward M. Norum | 2001-07-24 |
| 6260575 | Fluid flow control valve | Joseph P. Brown, Edward M. Norum | 2001-07-17 |
| 6199584 | Fluid flow control valve | Joseph P. Brown, Edward M. Norum | 2001-03-13 |
| 4944327 | Riser check valve | — | 1990-07-31 |