Patents by Inventor Wataru Hirakawa

Wataru Hirakawa 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).

  • Bipolar electric coagulating and dissecting tweezers
    Patent number: 6048341
    Abstract: A grooved channel serving as perfusion leading structure is formed between the opening of a perfusion tube at its front end and the bipolar electric coagulating and dissecting portions at the front ends of arms.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: April 11, 2000
    Assignee: Johnosn & Johnson Medical Kabushiki Kaisha
    Inventors: Wataru Hirakawa, Keiji Nakano, Tomohiko Asahara, Nobuhiro Kagaminuma