Patents by Inventor Yuji Annaka

Yuji Annaka 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 shaped article for CRT and having particular spectral transmittance characteristics
    Patent number: 5144499
    Abstract: Provided are optical shaped articles for CRT, such as projection lens and filter used for the CRT's of projection TV's, which comprise a transparent synthetic resin containing a red dyestuff or a combination of a green organic pigment and a yellow dyestuff and having specified spectral transmittance characteristics.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: September 1, 1992
    Assignee: Kuraray Co., Ltd.
    Inventors: Seiichi Kawanami, Tatsuo Sugiyama, Yoshiro Suzuki, Yasutaro Ito, Yuji Annaka