Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11420818 | Movable cover for fluid containment tanks | Brad Poikonen, Steven Piacsek | 2022-08-23 |
| D452301 | Combination unit for heating, lighting and debugging an area | Daniel Schwartz, Sam Tsao | 2001-12-18 |
| 5465753 | Safety vessel and valve assembly | — | 1995-11-14 |
| D348312 | Ceramic fragrance jar | Carl Triplett, Sharon L. Norris, Marcy Linda | 1994-06-28 |
| 5303843 | Fluid transport apparatus with water hammer eliminator system | Donald L. Zink, Donald G. Zink | 1994-04-19 |
| 5280874 | Internal valve | Donald L. Zink, Donald G. Zink | 1994-01-25 |
| 5222517 | Fluid containment vessel with one or more recessed wells | Donald L. Zink, Donald G. Zink | 1993-06-29 |
| 5113893 | Safety pressure relief valve shut-off | — | 1992-05-19 |
| 4872640 | Valve apparatus | — | 1989-10-10 |