Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D455077 | Closure | Val Hierzer, Bob Simpson | 2002-04-02 |
| 6315160 | System and method for dispensing viscuous material | Val Hierzer, Bob Simpson | 2001-11-13 |
| 6089418 | Dispensing closure with pressure actuated valve | Valentin Hierzer, Robert A. Simpson | 2000-07-18 |
| D398851 | Dispensing closure with pressure actuated valve | Valentin Hierzer, Robert A. Simpson | 1998-09-29 |