Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864457 | Method and device for controlling an electromagnet whose energization, by means of an ac current, causes engagement of two parts | Bataille Christian, Belbel Elie, Jean-Noel Gast | 1989-09-05 |