Jean Lefrancois

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Clermont-Ferrand, FR

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Patents Grantslast 30 patents

Information Patent Grant
Tire valves for tubeless and tube tires
- Patent number 4,364,427
- Issue date Dec 21, 1982
- Compagnie Generale des Etablissments Michelin
- Jean Lefrancois
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Inflation valve
- Patent number 4,340,080
- Issue date Jul 20, 1982
- Compagnie Generale des Etablissements Michelin
- Jean Lefrancois
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Process of fabricating hollow bead rings
- Patent number 4,204,309
- Issue date May 27, 1980
- Compagnie Generale des Etablissements Michelin
- Jean Lefrancois
- B60 - VEHICLES IN GENERAL