Membership
Tour
Register
Log in
Friedrich K. Frenkler
Follow
Person
Altensteig, DE
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Roof ventilator
Patent number
4,768,424
Issue date
Sep 6, 1988
Wilhelm Gebhardt and Co. GmbH
Friedrich K. Frenkler
F24 - HEATING RANGES VENTILATING