Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4684106 | Valve | Terrence J. Kolenc, Carl R. Bork, Jr., William C. Steiss, Earl D. Shufflebarger | 1987-08-04 |
| 4606374 | Valve | Terrence J. Kolenc, Carl R. Bork, Jr., William C. Steiss, Earl D. Shufflebarger | 1986-08-19 |
| 4530373 | Pressure relief valve | Carl R. Bork, Jr., William C. Steiss, Earl D. Shufflebarger, Stephen Matousek, Thomas J. Gardner | 1985-07-23 |
| 4262880 | Plug valve | Oliver L. Danko, William C. Steiss, William H. Amor, Thomas J. Gardner, Earl D. Shufflebarger | 1981-04-21 |