Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5303843 | Fluid transport apparatus with water hammer eliminator system | Donald L. Zink, John E. Schwartz | 1994-04-19 |
| 5285998 | Internal valve for pressure fluid containment vessels | Donald L. Zink | 1994-02-15 |
| 5280874 | Internal valve | Donald L. Zink, John E. Schwartz | 1994-01-25 |