Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5043541 | Branch circuit for insertable switch | Klaus Grahlmann, Jorn Grimm | 1991-08-27 |
| 4744001 | Contact arrangement for insertable power switches | Klaus Grahlmann | 1988-05-10 |