Hans Ryffel

Zürich

Trademarks, designs and patents

Flügelzellenmaschine

Swiss patent · CH661096 · Holder, Inventor

Deleted
Drehschiebermaschine

Swiss patent · CH634385 · Holder, Inventor

Deleted
Hydraulisch-mechanische Drehschiebermaschine

Swiss patent · CH596434 · Holder, Inventor

Deleted