The company invented the lateral translation of the wheel and the laying box to facilitate work on the verge of the road.

Between 1974 and 1993, several trenchers were built and leased to civil engineering companies to bury cables and Telecommunications networks, electricity, gas and water.

1995, the company investigated new markets abroad : Morocco, Algeria, Senegal, Colombia, Mexico, United States, Canada, which will soon represent 30% of its turnover.

2000, Marais developed a patented micro-trencher named CLEANFAST for optical fiber cable laying in urban areas.

[3] 2006, it is the European leader of mechanized laying in the field of power networks, telecommunications and water and gas supply burying.