Osvaldo himself acted as the company's sole designer for over 30 years; it was not until the mid 1980s that Gae Aulenti, Norman Foster and others began to contribute designs. Today, Tecno is known for its innovative furniture for offices and public buildings.

Osvaldo had a long history of participation in the Triennale di Milano dating back to 1933, when he collaborated with architects Cairoli and G. B. Varisco on a project called the "Casa Minima"; he would continue to exhibit his work there for decades to come. Borsani was widely honored in his lifetime. His designs were showcased by museums and galleries throughout Europe and, in 1962, he received the prestigious Premio Compasso d’Oro.