Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4739254 | Voltage measuring device of a high voltage metalclad installation | Robert Girard, Jean Kieffer | 1988-04-19 |
| 4543712 | Process for assembling a clad busbar of an electrical installation | Jean Kieffer | 1985-10-01 |
| 4477691 | High tension metal-clad installation subdivided into tight compartments | Andre Giboulet, Jean Kieffer | 1984-10-16 |