Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4573398 | Pressure control device and method of making the same | Carl N. Johnson, Roger L. Sieling | 1986-03-04 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4573398 | Pressure control device and method of making the same | Carl N. Johnson, Roger L. Sieling | 1986-03-04 |