Patents by Inventor Hirotatsu Okumura

Hirotatsu Okumura 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).

  • Optical component and method of manufacturing the same
    Patent number: 10371867
    Abstract: An optical component includes: a plastic base which has a convex surface and a concave surface; and a multilayer film which is disposed on at least the convex surface of the plastic base. The multilayer film has an average reflectivity of 2% to 10% over a wavelength range of 400 nm to 500 nm.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: August 6, 2019
    Assignee: NIKON-ESSILOR CO., LTD.
    Inventors: Masaoki Tomoda, Satoru Ito, Kei Ishimura, Hirotatsu Okumura