Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837504 | Electricity meter and method of calibrating same | Gion Durisch | 1989-06-06 |
| 4642637 | Method for transmitting data via a line of an alternating current distribution network, and a transmitter for carrying out the method | — | 1987-02-10 |