Patents by Inventor Masayuki Koizumi

Masayuki Koizumi 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).

  • Instrument for measuring a remaining alveolar bone
    Patent number: 5176516
    Abstract: A device for measuring the remaining portion of an alveolar bone is presented. The device comprises two elongated straight portions having each a leg portion. The elongate portions are connected to each other in slidable fashion similar to a caliper. The leg portions have width measuring probes which extend towards each other perpendicular to the leg portions. The widths measuring probes are arranged to penetrate the gum and contact opposite sides of the alveolar bone where by the the distance between the ends of the probes can be measured. The device also has a level measuring probe which extends from one of the elongate portions between the leg portions down towards the width measuring probes. The length measuring probe also penetrates the gum and measures how far down from the top of the alveolar bone, the width measuring probes are measuring.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: January 5, 1993
    Inventor: Masayuki Koizumi