Membership
Tour
Register
Log in
Gero Herrmann
Follow
Person
Karlsfeld, DE
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Mine roof support system
Patent number
5,238,329
Issue date
Aug 24, 1993
Dyckerhoff & Widmann AG of Munich
Lawrence E. Long
E21 - EARTH DRILLING MINING
Information
Patent Grant
Bundled tensioning member for prestressing a tall structural member...
Patent number
5,056,284
Issue date
Oct 15, 1991
Dyckerhoff & Widmann AG
Franz Ruckdeschel
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Wedge anchorage for a tension member in a prestressed concrete stru...
Patent number
4,718,209
Issue date
Jan 12, 1988
Dyckerhoff & Widmann Aktiengesellschaft
Per C. Hansen
E04 - BUILDING
Information
Patent Grant
Closed ring-shaped reinforcing member for a concrete structure
Patent number
4,694,623
Issue date
Sep 22, 1987
Dyckerhoff & Widmann Aktiengesellschaft
Gero Herrmann
E04 - BUILDING