Patents by Inventor Keisaku Koga

Keisaku Koga 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).

  • Storage tank for liquids or the like
    Patent number: D259437
    Type: Grant
    Filed: October 13, 1978
    Date of Patent: June 2, 1981
    Assignee: Sekisui Koji Kabushiki Kaisha
    Inventors: Keisaku Koga, Takeshi Iseda
  • Storage tank for liquids or the like
    Patent number: D259807
    Type: Grant
    Filed: October 13, 1978
    Date of Patent: July 7, 1981
    Assignee: Sekisui Koji Kabushiki Kaisha
    Inventors: Keisaku Koga, Takeshi Iseda
  • Storage tank for liquids or the like
    Patent number: D261026
    Type: Grant
    Filed: October 13, 1978
    Date of Patent: September 29, 1981
    Assignee: Sekisui Koji Kabushiki Kaisha
    Inventors: Keisaku Koga, Takeshi Iseda