TREA

Keiji Yamamoto

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  • Tokorozawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Variable contour rubber extruder
    • Patent number 4,744,745
    • Issue date May 17, 1988
    • Bridgestone Corporation
    • Jumei Harada
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Rotary roll-type rubber extruder
    • Patent number 4,576,563
    • Issue date Mar 18, 1986
    • Bridgestone Corporation
    • Jumei Harada
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL