Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4470707 | Electronic setting for analog timepiece | Paul Grand-Chavin, Jean P. Migeon, Georges J. Perrin, Michel Plancon | 1984-09-11 |
| 4445785 | Electronic time setting for a quartz analog watch | Jean-Francois Dufay, Paul Grand Chavin, Georges J. Perrin, Louis Vernay | 1984-05-01 |