Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4204162 | Method of controlling the condition of an electric battery and apparatus for carrying out this method | — | 1980-05-20 |
| 4201077 | Method for measuring the rate or the frequency error of a quartz timepiece and measuring apparatus for carrying out this method | — | 1980-05-06 |