Patents by Inventor Yasuo Umekawa

Yasuo Umekawa 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).

  • Two piece container cap
    Patent number: D309716
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: August 7, 1990
    Assignee: Koatsu Gas Kogyo Co., Ltd.
    Inventor: Yasuo Umekawa
  • Package of containers
    Patent number: D330160
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: October 13, 1992
    Assignee: Koatsu Gas Kogyo Co., Ltd.
    Inventor: Yasuo Umekawa