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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of making a heat exchanger

    • Patent number 5,797,184
    • Issue date Aug 25, 1998
    • Sanden Corporation
    • Hiroshi Tanaka
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Heat exchanger

    • Patent number 5,586,598
    • Issue date Dec 24, 1996
    • Sanden Corporation
    • Hiroshi Tanaka
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    3467180

    • Patent number 3,467,180
    • Issue date Sep 16, 1969
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...