Patents by Inventor Takuzo Takeuchi

Takuzo Takeuchi 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).

  • Drilling machine
    Patent number: 4163622
    Abstract: A drilling machine comprising an article holding device and two drilling devices, being characterized that each drilling device has one drill turning in the same direction at a synchronized speed, each drill approaching to or separating from each other symmetrically to make a hole from both sides of a rigid and fragile article made of glass or ceramic e.g. lenses of spectacles at the same time, and that the hole is chamfered and further a groove for fixing the article to the frame is made on the article, as required.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: August 7, 1979
    Assignee: Hoya Lens Corporation
    Inventors: Hayao Akaba, Takuzo Takeuchi