Patents by Inventor Hisayasu Sakai

Hisayasu Sakai 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).

  • Water closet
    Patent number: D379496
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: May 27, 1997
    Assignee: Toto Ltd.
    Inventors: Seijiro Kawamura, Minoru Tani, Hisayasu Sakai
  • Water closet
    Patent number: D384136
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: September 23, 1997
    Assignee: Toto Ltd.
    Inventors: Seijiro Kawamura, Minoru Tani, Hisayasu Sakai
  • Water closet
    Patent number: D399294
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: October 6, 1998
    Assignee: TOTO Ltd.
    Inventors: Seijiro Kawamura, Minoru Tani, Hisayasu Sakai
  • Trap portion of a water closet
    Patent number: D406329
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: March 2, 1999
    Assignee: Toto Ltd.
    Inventors: Seijiro Kawamura, Minoru Tani, Hisayasu Sakai
  • Trap portion of a water closet
    Patent number: D432218
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: October 17, 2000
    Assignee: Toto Ltd.
    Inventors: Seijiro Kawamura, Minoru Tani, Hisayasu Sakai