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Michel Coulon
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Champs-sur-Marne, FR
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Patent Grant
Process and apparatus for the production of spectacle frame parts o...
Patent number
4,265,850
Issue date
May 5, 1981
Essilor International Cie Generale d'Optique
Michel Coulon
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL