Patents by Inventor Kazuya Hijii

Kazuya Hijii 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).

  • Ultrasonic treating apparatus with device for inhibiting drive when ultrasonic element is determined to be defective
    Patent number: 5042460
    Abstract: An ultrasonic treating apparatus includes an inpedance detection unit for detecting the impedance of an ultrasonic vibration element for transmitting ultrasonic vibrations and a determining unit for determining whether the ultrasonic vibration element is good or not. If the ultrasonic vibration element is found not to be good, then a control unit inhibits ultrasonic vibrations from being generated from the ultrasonic vibration element. It is thus possible to prevent any breakage of the apparatus.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: August 27, 1991
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Tomohisa Sakurai, Masakazu Gotanda, Toshihiko Suzuta, Tatsuya Kubota, Kazuya Hijii, Yuichi Ikeda, Hitoshi Karasawa, Hiroaki Kagawa, Eiichi Fuse, Tetsumaru Kubota, Tadao Hagino