TREA

Gerard Obrecht

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  • Les Moulineaux, FR
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Patents Grantslast 30 patents

  • Information Patent Grant

    Artificial optical lens and method of manufacturing it
    • Patent number 5,172,143
    • Issue date Dec 15, 1992
    • Essilor International "Cie Generale d'Optique"
    • Dominique Baude
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Simultaneous vision optical lens for correcting presbyopia
    • Patent number 4,976,534
    • Issue date Dec 11, 1990
    • Essilor International, Cie Generale d'Optique
    • Christian Miege
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Progressive ophthalmic lens
    • Patent number 4,854,689
    • Issue date Aug 8, 1989
    • Essilor International Compagnie Generale d'Optique
    • Maurice Dufour
    • G02 - OPTICS
  • Information Patent Grant

    Progressive lens
    • Patent number 4,796,988
    • Issue date Jan 10, 1989
    • Essilor International Compagnie Generale d'Optique
    • Maurice Dufour
    • G02 - OPTICS