Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845459 | Contact arrangement of a low-voltage circuit breaker with electro-dynamic breaking | Martin Boettcher, Bernhard Pfeiffer | 1989-07-04 |
| 4845460 | Multipole low-voltage circuit breaker with an insulating material housing and arc-quenching chambers | Martin Boettcher, Bernhard Pfeiffer | 1989-07-04 |