Rainer Isolierrohrfabrik Max Drossbach

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Patents Grantslast 30 patents

Information Patent Grant
Corrugated drainage tubing and method and apparatus for making drai...
- Patent number 4,270,878
- Issue date Jun 2, 1981
- Rainer Isolierrohrfabrik Max Drossbach
- David E. Fales
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Corrugated drainage tubing with helically arranged drainage openings
- Patent number 4,163,619
- Issue date Aug 7, 1979
- Rainer Isolierrohrfabrik Max Drossbach
- David E. Fales
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

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