Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834621 | Air throttling valve for submerged pump system | Keith Hall, Ralph N. DiLorenzo | 1989-05-30 |
| 4586528 | Air release valve | Lewis B. Andres, Ralph N. Di Lorenzo | 1986-05-06 |