Peter Hartmann

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Feldmeflen, CH

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for producing a composite pipe in a rotating drum
- Patent number 5,238,384
- Issue date Aug 24, 1993
- Von Roll AG
- Peter Hartmann
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method for producing a composite pipe in a rotating drum
- Patent number 5,082,614
- Issue date Jan 21, 1992
- Peter Hartmann Beteiligungen AG
- Peter Hartmann
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Process for producing a pipe section and compound pipe produced acc...
- Patent number 4,957,683
- Issue date Sep 18, 1990
- Peter Hartmann
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL