Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864223 | Measuring transformer to measure the current flowing in an electric conductor | Andreas Joder, Mathis Halder | 1989-09-05 |
| 4864238 | Device for measuring weak magnetic fluxes utilizing planar technology | — | 1989-09-05 |
| 4810989 | Transformer system for measuring electrical current | Urs Brandenberg | 1989-03-07 |