Hans Wenger

Lengwil-Oberhofen

Trademarks, designs and patents

Täferelement

Swiss patent · CH658094 · Inventor

Deleted
Zweischalige schalldämmende Innentrennwand

Swiss patent · CH639164 · Inventor

Deleted
Zweischaliges Trennwandelement

Swiss patent · CH524035 · Holder

Deleted