TREA

Saburo Ishijima

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sluice valve arrangement
    • Patent number 4,457,488
    • Issue date Jul 3, 1984
    • Japan Oxygen Co., Ltd.
    • Hiroshi Ishii
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Vacuum furnace for heat treatment
    • Patent number 4,417,722
    • Issue date Nov 29, 1983
    • Japan Oxygen Co., Ltd.
    • Hiroshi Ishii
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Process for producing a metal vacuum bottle
    • Patent number 4,157,779
    • Issue date Jun 12, 1979
    • Nippon Sanso K.K.
    • Hiroshi Ishii
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR