Hans Berger

Gudo

Trademarks, designs and patents

Elektrofahrzeug

Swiss patent · CH662788 · Holder, Inventor

Deleted
Schnellflug-Helikopter

Swiss patent · CH666664 · Holder, Inventor

Deleted
Helikopter-Rotorblatt

Swiss patent · CH666234 · Holder, Inventor

Deleted
Steuerbarer Ballon

Swiss patent · CH637585 · Holder, Inventor

Deleted