Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4911409 | Ball valve | John P. Oliver | 1990-03-27 |
| 4887794 | Ball valve | John P. Oliver | 1989-12-19 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4911409 | Ball valve | John P. Oliver | 1990-03-27 |
| 4887794 | Ball valve | John P. Oliver | 1989-12-19 |