Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5474194 | Closure with irreversible color change system | Robert J. Heilman, Mark Egger, Leonard Rozanksi | 1995-12-12 |
| 5035341 | Closure cap having tamper indicating means | Robert J. Heilman | 1991-07-30 |