Frei, Martin

CH-9434 Au/SG

Trademarks, designs and patents

Warmluftheizeinrichtung

European patent · EP0840073 · Holder, Inventor

Deleted
Cheminée mit Primär- und Sekundärluft

European patent · EP0559619 · Inventor

Deleted
Warmluft-Cheminée

European patent · EP0559618 · Inventor

Deleted
Feuerungsanlage

European patent · EP0480870 · Inventor

Deleted