Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5289929 | Tamper indicating means for vacuum closures | Robert J. Heilman, Robert E. Sparks, Norbert S. Mason | 1994-03-01 |
| 5022545 | Tamper evident closure | — | 1991-06-11 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5289929 | Tamper indicating means for vacuum closures | Robert J. Heilman, Robert E. Sparks, Norbert S. Mason | 1994-03-01 |
| 5022545 | Tamper evident closure | — | 1991-06-11 |