Patents by Inventor Haruo Matumaru

Haruo Matumaru 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).

  • Patent number: 4107568
    Abstract: A face plate for a color pick-up tube which comprises a transparent substrate, stripe-like color filters formed on the transparent substrate, a protection layer deposited so as to cover the stripe color filters and the exposed portions of the transparent substrate, stripe-like transparent electrodes formed on predetermined portions of the protection layer, a photoconductive layer, bus bar electrodes and an insulation layer.The insulation layer and the protection layer are, respectively, formed of different materials which have different resistances to an etching solution, whereby the stripe-like filters are protected from the adverse influence of the etching solution used to form the insulation layer by a photoetching treatment.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: August 15, 1978
    Assignees: Hitachi, Ltd., Hitachi Electronics Ltd.
    Inventors: Toshio Nakano, Akira Sasano, Ken Tsutsui, Haruo Matumaru