Erich Richartz

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Grafing B. Munich, DE

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Patents Grantslast 30 patents

Information Patent Grant
Corrosion-protected tension member of steel
- Patent number 6,322,281
- Issue date Nov 27, 2001
- Dyckerhoff & Widmann Aktiengesellschaft
- Dieter Jungwirth
- D07 - ROPES CABLES OTHER THAN ELECTRIC
Information Patent Grant
Method of producing an intended breaking point in a tension member...
- Patent number 5,707,181
- Issue date Jan 13, 1998
- Dyckerhoff & Widmann Aktiengesellschaft
- Hans-Peter von Allmen
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hot-rolled steel bar with helically extending ribs, method of and a...
- Patent number 4,953,379
- Issue date Sep 4, 1990
- Dyckerhoff & Widmann Aktiengesellschaft
- Erich Richartz
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...