TREA

Yoshiharu Sago

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  • Nagoya, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of preparing heat exchange element
    • Patent number 4,650,621
    • Issue date Mar 17, 1987
    • Toho Gas Co., Ltd.
    • Yoshiharu Sago
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Heat exchange element
    • Patent number 4,595,403
    • Issue date Jun 17, 1986
    • Toho Gas Co. Ltd.
    • Yoshiharu Sago
    • F24 - HEATING RANGES VENTILATING