Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4709396 | Tamper-evident envelope with indicia underlying cohesive layers | Danny Strickland | 1987-11-24 |
| 4709397 | Tamper-evident envelope with indicia-forming cohesive layers | Danny Strickland | 1987-11-24 |