TREA

Jan R. de Fries

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  • Wallisellen, CH
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Patents Grantslast 30 patents

  • Information Patent Grant

    Solar cell with a solar collector and storage elements
    • Patent number 6,581,589
    • Issue date Jun 24, 2003
    • Giuseppe Fent
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Spool valve
    • Patent number 5,487,409
    • Issue date Jan 30, 1996
    • Festo KG
    • Kurt Stoll
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Spool valve having improved sealing characteristics
    • Patent number 5,163,478
    • Issue date Nov 17, 1992
    • Festo KG
    • Jan R. de Fries
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Multiway valve
    • Patent number 4,212,320
    • Issue date Jul 15, 1980
    • Festo-Maschinenfabrik Gottlieb Stoll
    • Kurt Stoll
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Valve arrangement
    • Patent number 4,199,130
    • Issue date Apr 22, 1980
    • Festo-Maschinenfabrik Gottlieb Stoll
    • Kurt Stoll
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Working cylinder for pneumatic or hydraulic pressure media
    • Patent number 4,080,877
    • Issue date Mar 28, 1978
    • Jan Richard deFries
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Multiple way valve
    • Patent number 4,066,101
    • Issue date Jan 3, 1978
    • Jan Richard DE Fries
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...