Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875477 | Protective mask having a built-in sensor for monitoring vital functions | Lothar Topfer, Alfred Rath | 1989-10-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875477 | Protective mask having a built-in sensor for monitoring vital functions | Lothar Topfer, Alfred Rath | 1989-10-24 |