From Wikipedia: René Desmaison (April 14, 1930, in Bourdeilles, Dordogne – September 28, 2007) was a veteran French mountaineer, climber and alpinist. Desmaison had climbed more than 1,000 mountains since the 1950s. He made the first ascent of 114 previously unclimbed mountains throughout the Andes, Alps and Himalayas in his 40-year climbing career. He is also credited with creating several new winter routes in the Alps. René Desmaison died on September 28, 2007, at La Timone Hospital in Marseille, France. He was 77 years old. ................................................... Pitons of different shapes designed by Joanny, whose technical advisor was René Desmaison. Founded in 1957, Rivory Joanny was a family business located in Saint Chamond in the Loire region. It ceased operations in 1999. - Pitons are from 1970
Joanny R. Desmaison piton shown on ebay 8/2025 - To me this looks like a Stubai manufactured piton that was made and marked for the Joanny company.
R.Desmaison alpelit ice axe - Shown on ebay 10/2025