Frei, Max

Schönenwerd

Trademarks, designs and patents

Federwindemaschine

Swiss patent · CH669342 · Inventor

Deleted
Schleifmaschine, insbesondere zum endseitigen Schleifen von Schraubenfedern

Swiss patent · CH614653 · Inventor

Deleted
Glühofen

Swiss patent · CH580163 · Inventor

Deleted