Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4456667 | Tamperproof document and a process for producing the same | Richarda Bochow, Helmut Bergmann | 1984-06-26 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4456667 | Tamperproof document and a process for producing the same | Richarda Bochow, Helmut Bergmann | 1984-06-26 |