Patents by Inventor Tomio Sawada

Tomio Sawada 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).

  • Hyaluronic acid gel, a method of its production and medical material containing it
    Patent number: 6387413
    Abstract: A gel made of hyaluronic acid alone which is hardly soluble in a neutral aqueous solution and which keeps its shape for at least one day in a neutral aqueous solution at 25° C.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: May 14, 2002
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiaki Miyata, Akio Okamoto, Masatoshi Kawata, Kazuhiro Oshima, Masamichi Hashimoto, Kazuhiko Arai, Tomio Sawada