Patents by Inventor Kouichi Doi, deceased

Kouichi Doi, deceased 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).

  • Pilfer-proof synthetic resin cap
    Patent number: 5289931
    Abstract: A cap has a circumferential band with flap pieces formed at the lower end of a cylindrical skirt portion via a weakened portion, and a feature resides in a circumferential curled portion that is formed at the lower end of the circumferential band. When the cap is opened, the flap pieces effectively prevents the circumferential band from entirely escaping.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: March 1, 1994
    Assignee: Japan Crown Cork Co., Ltd.
    Inventor: Kouichi Doi, deceased