Patents by Inventor Tetsushi Oka

Tetsushi Oka 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).

  • Elastic woven or knitted fabric, and cushioning material and seat using the same
    Publication number: 20030096547
    Abstract: The present invention relates to an elastic woven or knitted fabric that has an elastic yarn comprising an organic synthetic macromolecule disposed in at least part thereof, and has the following physical properties:
    Type: Application
    Filed: October 4, 2002
    Publication date: May 22, 2003
    Inventors: Tetsushi Oka, Yasuo Ohta, Syouji Oda
  • Method for producing polymer blend fibers having phase separation structure
    Patent number: 6245268
    Abstract: Polymer blend fibers having a phase separation structure are provided. The phase separation structure is a sea-island structure and a diameter D1 on a circle basis of an island phase of the sea-island structure in a transverse cross-section of the fibers is in the range of 0.001 to 0.4 &mgr;m.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: June 12, 2001
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tetsushi Oka, Seiki Nishihara, Hiroshi Yasuda
  • Polymer blend fibers having phase separation structure and method for producing the same
    Patent number: 5869183
    Abstract: Polymer blend fibers having a phase separation structure are provided. The phase separation structure is a sea-island structure and a diameter D.sub.1 on a circle basis of an island phase of the sea-island structure in a transverse cross-section of the fibers is in the range of 0.001 to 0.4 .mu.m.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: February 9, 1999
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tetsushi Oka, Seiki Nishihara, Hiroshi Yasuda