Patents by Inventor Yukio Akutsu

Yukio Akutsu 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).

  • Process for finishing optical lenses and apparatus therefor
    Patent number: 4920700
    Abstract: A process and apparatus for finishing optical lenses including processing steps of smoothing and polishing of the lens, suitable in particular for the production of ophthalmic lenses, characterized by a special feature of replacing, after completion of the smoothing, the smoothing pad by a polishing and changing over the spent lapping compound recovering and recirculating means from that for the smoothing compound to that designated for a polishing compound, in order to effect thereafter the polishing of the lens on the same processing machine.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: May 1, 1990
    Assignee: Hoya Corporation
    Inventors: Hiroyuki Murahashi, Yukio Akutsu, Shinichi Koyama