Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879123 | Tubular package casing composed of mutually connected sections | — | 1989-11-07 |
| 4871791 | Permanently plasticized, cellulose-based product | Klaus-Dieter Hammer, Hermann Winter | 1989-10-03 |