Patents by Inventor Toshiyuki Koshimizu

Toshiyuki Koshimizu 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).

  • Plastic lens and production method thereof
    Patent number: 6466376
    Abstract: A plastic lens molded through a gate in a molding process has a gate-located portion on an outer peripheral surface of the plastic lens, and a concave surface provided on at least a part of the gate-located portion.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: October 15, 2002
    Assignee: Konica Corporation
    Inventors: Toshiyuki Koshimizu, Kazuo Ishida, Etsuzo Kurihara
  • Plastic lens and production method thereof
    Publication number: 20010007513
    Abstract: A plastic lens molded through a gate in a molding process has a gate-located portion on an outer peripheral surface of the plastic lens, and a concave surface provided on at least a part of the gate-located portion.
    Type: Application
    Filed: December 21, 2000
    Publication date: July 12, 2001
    Applicant: KONICA CORPORATION
    Inventors: Toshiyuki Koshimizu, Kazuo Ishida, Etsuzo Kurihara