Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9657247 | Auxiliary acid and sour gas treatment system and method | — | 2017-05-23 |
| 5386845 | Fluid transport apparatus with side recessed fitting well | — | 1995-02-07 |
| 5312012 | Vapor space water hammer eliminator system for liquid transport apparatuses | — | 1994-05-17 |
| 5303843 | Fluid transport apparatus with water hammer eliminator system | Donald G. Zink, John E. Schwartz | 1994-04-19 |
| 5285998 | Internal valve for pressure fluid containment vessels | Donald G. Zink | 1994-02-15 |
| 5280874 | Internal valve | Donald G. Zink, John E. Schwartz | 1994-01-25 |
| 5251658 | Fluid apparatus with at least one tube well | — | 1993-10-12 |
| 5238022 | Internal rotary valve actuator system | — | 1993-08-24 |
| 5228473 | Internal safety valve system | — | 1993-07-20 |
| 5222517 | Fluid containment vessel with one or more recessed wells | Donald G. Zink, John E. Schwartz | 1993-06-29 |
| 5220943 | Internal pump assembly | — | 1993-06-22 |
| 5211202 | Fluid apparatus with pressure-tight recessed well | Donald G. Zink | 1993-05-18 |
| 5141013 | Fluid containment apparatus | Donald G. Zink | 1992-08-25 |
| 5097976 | Fluid containment apparatus with well closure assembly | Donald G. Zink | 1992-03-24 |