Patents by Inventor Tadaki Kagaya

Tadaki Kagaya 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).

  • Artificial teeth for anterior teeth portions
    Patent number: 4909738
    Abstract: An artificial tooth for anterior teeth portions including a concave hollow extending from a basal segment to a lingual incisal segment and located in a substantially central segment, wherein: a percentage of the major diameter of the hollow to the full length is in a range of 10% to 100%, a maximum depth of the hollow is in a range of 0.5 mm to 5.0 mm and a minimum thickness of a cervical segment is in a range of 0.1 mm to 5.0 mm, and a width and length of the cervical segment being defined in terms of a percentage of the cervical minimum mesiodistal length to the maximum mediodistal length being in a range of 50% to 100% and a percentage of the cervical major diameter to the full major diameter being in a range of 10% to 50%.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: March 20, 1990
    Assignee: G-C Toshi Kogyo Corporation
    Inventors: Minoru Ai, Kensuke Yamagata, Tadaki Kagaya, Akira Hasegawa, Yuji Nakamura, Ikuo Ikeda