Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824350 | Sliding shuttering system | Arnold Sommer, Guido Herzog | 1989-04-25 |
| 4804320 | Sliding shuttering device | Arnold Sommer | 1989-02-14 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824350 | Sliding shuttering system | Arnold Sommer, Guido Herzog | 1989-04-25 |
| 4804320 | Sliding shuttering device | Arnold Sommer | 1989-02-14 |