Patents by Inventor Toshio Nara

Toshio Nara 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).

  • Apparatus for determining the three-dimensional position and attitude
    Patent number: 4639220
    Abstract: An apparatus for measuring the three-dimensional position and attitude of upper and lower clutches attached on patient's maxillary and mandibular teeth for computerized measurement of the mandibular movements necessary for the fabrication of dental prostheses is disclosed. The apparatus includes a part of a sphere that is fixed to the mandible and which is marked with a reference line and a part of another sphere of substantially the same radius as that of the above sphere, which is fixed to the maxilla and which is also marked with a reference line. The surfaces of the two spheres are caused to slide against each other, with their centers being in alignment, thereby achieving the measurement of the relative attitude of the two spheres.
    Type: Grant
    Filed: November 29, 1983
    Date of Patent: January 27, 1987
    Assignee: Nippon Avionics Co., Ltd.
    Inventors: Toshio Nara, Sumiya Hobo, Masao Kashiwada, Motoyuki Totsuka, Takao Hoshiai, Katsutoshi Umetani, Keisuke Akamatsu, Tomohide Inada, Hisao Takayama