Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4303708 | Heat-sealable plastic film, process for its manufacture, and the use of the film | Gunther Crass, Siegfried Janocha | 1981-12-01 |
| 4256784 | Heat-sealable plastic film | Siegfried Janocha | 1981-03-17 |