Patents by Inventor Nobumasa Tatara

Nobumasa Tatara 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).

  • Forming hollow plastic product partially different in composition and its manufacturing apparatus
    Patent number: 5156796
    Abstract: A composite parison generally cylindrical in shape and including two or more plastic materials different in characteristic is formed. Using this composite parison, a hollow plastic product of any desired shape having a locally different characteristic, such as in softness, heat-resistance or wear-resistance, can be manufactured with ease, for example, by conventional blow molding.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: October 20, 1992
    Assignee: Excell Corporation
    Inventors: Tatsuya Nakagawa, Nobumasa Tatara