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Patents Grantslast 30 patents

  • Information Patent Grant

    Heat exchanger

    • Patent number 5,803,165
    • Issue date Sep 8, 1998
    • Hitachi, Ltd.
    • Naoki Shikazono
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Multiple finned tube and a method for its manufacture

    • Patent number 5,803,164
    • Issue date Sep 8, 1998
    • Wieland Werke AG
    • Gerhard Schuez
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Evaporator of refrigerator

    • Patent number 5,784,897
    • Issue date Jul 28, 1998
    • Daewoo Electronics Co., Ltd.
    • Jun-Chul Shin
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Method of manufacture of a multiple finned tube

    • Patent number 5,761,807
    • Issue date Jun 9, 1998
    • Wieland Werke AG
    • Gerhard Schuez
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Heat transfer tube having grooved inner surface and production meth...

    • Patent number 5,704,424
    • Issue date Jan 6, 1998
    • Mitsubishi Shindowh Co., Ltd.
    • Haruo Kohno
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Grooved tubes for heat exchangers in air conditioning equipment and...

    • Patent number 5,692,560
    • Issue date Dec 2, 1997
    • Trefimetaux
    • Michel Messant
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Heat exchanger tube with turbulator

    • Patent number 5,167,275
    • Issue date Dec 1, 1992
    • Bennie J. Stokes
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Inner finned heat exchanger tube

    • Patent number 4,154,296
    • Issue date May 15, 1979
    • American Standard Inc.
    • David F. Fijas
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    3077928

    • Patent number 3,077,928
    • Issue date Feb 19, 1963
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    2763470

    • Patent number 2,763,470
    • Issue date Sep 18, 1956
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    2731245

    • Patent number 2,731,245
    • Issue date Jan 17, 1956
    • F28 - HEAT EXCHANGE IN GENERAL