TREA

Roland Fischer

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Patents Grantslast 30 patents

  • Information Patent Grant

    Two stage rotary vane pump
    • Patent number 4,508,494
    • Issue date Apr 2, 1985
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Erich Bachmann
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Vacuum pump assembly with built-in shutoff valve
    • Patent number 4,193,742
    • Issue date Mar 18, 1980
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Klaus Fischer
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...