René Viredaz

Lausanne

Trademarks, designs and patents

Aéronef à sustentation par air chaud

Swiss patent · CH631398 · Holder, Inventor

Deleted
Planeur de pente

Swiss patent · CH585636 · Holder, Inventor

Deleted
Aéronef à voilure souple

Swiss patent · CH588378 · Holder, Inventor

Deleted