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Helmut Lieske
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Munich, DE
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last 30 patents
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Patent Grant
Method and apparatus for producing prefabricated components from pr...
Patent number
5,439,629
Issue date
Aug 8, 1995
Dyckerhoff & Widmann Aktiengesellschaft
Joachim Heintz
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Prestressed concrete railroad tie
Patent number
5,135,164
Issue date
Aug 4, 1992
Dyckerhoff & Widmann Aktiengesellschaft
Peter Auer
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Railroad roadway for high speed rail-mounted vehicles
Patent number
4,905,896
Issue date
Mar 6, 1990
Dyckerhoff & Widmann Aktiengesellschaft
Josef Eisenmann
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Method of and apparatus for the manufacture of prefabricated prestr...
Patent number
4,489,024
Issue date
Dec 18, 1984
Dyckerhoff & Widmann Aktiengesellschaft
Peter Auer
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Apparatus for the production of finished prestressed concrete members
Patent number
4,105,382
Issue date
Aug 8, 1978
Dyckerhoff & Widmann Aktiengesellschaft
Peter Auer
B28 - WORKING CEMENT, CLAY, OR STONE