King Louis XV’s clockmaker created the company LEPAUTE.

Founding of the holding company CGE (Compagnie Générale d’Electricté)

CGE created CGEE (Compagnie Générale d'Entreprises Electriques) to set up and install the networks necessary for the electrification of France.

Creation of the factory in Villeurbanne (69)

Birth of the company SOPRANO INDUSTRYin Clamart (92)

Birth of CGEE ALSTHOM following the take-over of SGE by CGE.
This then became the largest electrical company in Europe, with 13,000 employees.

The CGEE ALSTHOM factory specialises itself more and more in safety and security components, military weapons, air conditioning and relay circuitry.

CGE and the British firm GEC sign contract agreements. CGEE ALSTHOM adopts the name of CEGELEC. The Registered Head Office of SOPRANO INDUSTRY is transferred from Clamart to Villeurbanne.

CEGELEC SOPRANO INDUSTRY is recognised as being the specialist in the fields of severe environment, military, security, alarm systems, hardened printed circuit boards. Transfer from Villeurbanne to Vaulx-Milieu (38).

Buy-out of CEGELEC by ALSTOM for ALCATEL. Concentration on the railway market : air conditioning and relay circuitry.

MCC (Mobile Climate Control), market leader in special air conditioning, agricultural, public works machinery and equipment, purchases SOPRANO INDUSTRY for its railway activity.

SOPRANO INDUSTRY goes independent.

Export development under the Mobile Comfort brand.