Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5088896 | Jet pump with rotatable venturi cartridge | Darryl M. Nielsen | 1992-02-18 |
| 4687023 | Ball check valve | Joe A. Harbison, Darryl M. Nielsen | 1987-08-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5088896 | Jet pump with rotatable venturi cartridge | Darryl M. Nielsen | 1992-02-18 |
| 4687023 | Ball check valve | Joe A. Harbison, Darryl M. Nielsen | 1987-08-18 |