Bruno Proust

Tonna Electronique SA engages in the design, manufacture, and marketing of equipment for receiving and distributing conventional, satellite, and cable television. Its products are divided into access control and security equipment, television equipment, and cable network equipment. The Access control and security equipment include audio and video carriers, encoders, electric locks, pushbuttons, remote center management systems, cameras, monitors and domes. The Television equipment comprises of antennas, modulators, switches, converters, receivers, optical transmitters and input jacks. The Cable network equipment includes main stations, amplifiers, distributors, splitters, feeders, modems and network heads. The company was founded by Marcel Cocset and Marc Tonna in 1949 and is headquartered Reims, France.

Pont-sur-Seine Industrie SAS specializes in plastic molds injections and related equipment. The private company is based in Pont-sur-Seine, France. The French company was founded in 1997 by Gérard Leduc.

Elap SAS is a French company that focuses on innovation and quality. The private company is based in France, specifically in Pont-sur-Seine. The company is a part of MGG Industries, which aims to preserve industrial know-how.

Financière Tonna SA is an investment holding private company based in Reims, France. The French company functions as an investment holding company. The CEO of the company is Bruno Proust.

Financière Pontoise SAS operates as an investment holding company. The company was founded on November 27, 1998 and is headquartered in Pont-sur-Seine, France.