Patents by Inventor Takeyoshi Suetsuna

Takeyoshi Suetsuna 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).

  • Manufacturing methods of optical disc and blank master
    Patent number: 5851251
    Abstract: A blank master for manufacturing an optical disc is produced by the method including steps of grinding a glass disc, cleansing the glass disc, drying the glass disc, coating a binding agent on the glass disc, coating a photo resist on the glass disc within 24 hours from the grinding, and baking the glass disc.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: December 22, 1998
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Tetsuya Kondo, Takeyoshi Suetsuna