Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808975 | Arrangement for checking and indicating the malfunction of a lamp in monitoring and switching systems | Hermann Hochhaus | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808975 | Arrangement for checking and indicating the malfunction of a lamp in monitoring and switching systems | Hermann Hochhaus | 1989-02-28 |