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Michel Langenfeld
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Vandoeuvre, FR
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last 30 patents
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Patent Grant
Plastic tube formed by spiral winding of a snap locking profile strip
Patent number
4,301,200
Issue date
Nov 17, 1981
Pont-A-Mousson S.A.
Michel Langenfeld
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Patent Grant
Large-diameter insulated pipe
Patent number
4,114,657
Issue date
Sep 19, 1978
Pont-A-Mousson S.A.
Michel Langenfeld
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...