After contributing, in 1848, to the technical growth of the craft with the development of monumental clockwork mechanisms intended for Norman buildings, at the beginning of the 20th century the company designed the "mourning hammer” system whereby two sounds were produced by a single bell. Biard-Roy is one of the principal historically renowned names in an increasingly rare craft whose skills can only be acquired by long practice. With two sites, Sainte-Austreberthe (Haute-Normandie) and Villedieu-les-Poëles (Basse-Normandie), today the company carries on a tradition of making and restoring belfries and the designing, installation, restoration and maintenance of church and other bells and monumental dials. It applies traditional skills to its work: mortise and tenon frameworks, housed joints and clamping using wooden dowels, and yokes with traditional shapes and ironmongery. It also uses decidedly innovative processes and has designed special calculation software for designing plans for belfries. The company regularly undertakes the restoration of historic monuments, including cathedrals in Normandy and the Big Clock of Rouen.