Patents by Inventor Takeyuki Saitoh

Takeyuki Saitoh 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
    Patent number: 8619371
    Abstract: A plastic lens includes a first surface and second surface that each have an optical function; and a peripheral surface formed at a periphery of the first surface and the second surface; and has a central portion of a thickness that is thinner than that of a peripheral portion of the plastic lens. The second surface includes an optically functional concave aspect, a recess formed along an outer perimeter of the concave aspect, a first protruding portion formed at a boundary of the concave aspect and the recess, a second protruding portion formed at a boundary of the recess and the peripheral surface, and a gate portion formed on the peripheral surface, at a position where a resin injection outlet is arranged during formation of the plastic lens.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: December 31, 2013
    Assignee: Tamron Co., Ltd.
    Inventors: Noboru Fujino, Takeyuki Saitoh
  • PLASTIC LENS
    Publication number: 20120140336
    Abstract: A plastic lens includes a first surface and second surface that each have an optical function; and a peripheral surface formed at a periphery of the first surface and the second surface; and has a central portion of a thickness that is thinner than that of a peripheral portion of the plastic lens. The second surface includes an optically functional concave aspect, a recess formed along an outer perimeter of the concave aspect, a first protruding portion formed at a boundary of the concave aspect and the recess, a second protruding portion formed at a boundary of the recess and the peripheral surface, and a gate portion formed on the peripheral surface, at a position where a resin injection outlet is arranged during formation of the plastic lens.
    Type: Application
    Filed: October 20, 2011
    Publication date: June 7, 2012
    Inventors: Noboru FUJINO, Takeyuki Saitoh