Patents by Inventor Tetsuo Amawa

Tetsuo Amawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Mat consisting of filament loop aggregations and method and apparatus for producing the same
    Patent number: 4952265
    Abstract: In this mat consisting of filament loop aggregations, irregular form loops are formed in the upright direction by respectively winding to be coil-like many filaments coarse in the arranging intervals and made of a thermoplastic synthetic resin and are fused in the intersecting parts and the other loops are formed in the laterally fallen direction and are fused in the overlapping parts.
    Type: Grant
    Filed: April 12, 1988
    Date of Patent: August 28, 1990
    Assignee: Kabushiki Kaisha Risuron
    Inventors: Minoru Yamanaka, Tetsuo Amawa
  • Mat consisting of filament loop aggregations and method and apparatus for producing the same
    Patent number: 4859516
    Abstract: In this mat consisting of filament loop aggregations, the filament loop aggregations wherein irregular form loops are formed in the upright direction by respectively winding to be coil-like many filaments coarse in the arranging intervals and made of a thermoplastic synthetic resin and are fused in the intersecting parts are overlapped above and below an intermediate filament loop aggregation layer high in the filament density and formed of coiled loops in the partly or all laterally fallen direction.
    Type: Grant
    Filed: April 12, 1988
    Date of Patent: August 22, 1989
    Assignee: Kabushiki Kaisha Risuron
    Inventors: Minoru Yamanaka, Tetsuo Amawa