Patents by Inventor Mitsuhiro Aoyagi

Mitsuhiro Aoyagi 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).

  • Cutting instrument for a root canal filler in dental treatment
    Patent number: 4255142
    Abstract: A base portion has an upper surface on which are formed slots for receiving root canal fillers. The slots are graduated whereby the length of each root canal filler can be adjusted easily. The base portion is provided with a cover plate for pressing and fixing the root canal fillers placed in the slots, the cover plate having a flat, inner pressing surface and being pivotably attached to one side of the base portion.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: March 10, 1981
    Inventor: Mitsuhiro Aoyagi