Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843311 | Wattmeter comprising a hall sensor and an A/D converter | Silvo Zlebir | 1989-06-27 |
| 4808918 | Watthour meter comprising a Hall sensor and a voltage-frequency converter for very low voltages | — | 1989-02-28 |