Stoppino was a key figure in the development of Italian industrial design, particularly in the 1960s and 1970s, and collaborated with some of Italy's most prominent design companies, including Cassina and B&B Italia.

His design approach combined functionality with an aesthetic rooted in simplicity and elegance. Stoppino's work in furniture design and architecture often involved clean lines, modularity, and an emphasis on creating pieces that were both visually striking and practical for everyday use.

One of his most notable contributions was his involvement in the design of office furniture, where he brought a modern, innovative touch to functional spaces. His collaboration with Cassina led to several iconic designs that remain highly regarded in the world of Italian furniture design.

Stoppino's legacy lies in his ability to seamlessly blend art, architecture, and design, helping to shape the Italian modernist movement and influencing future generations of designers.