Patents by Inventor Hidetugu Takaoka

Hidetugu Takaoka 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).

  • Cathode for a gas discharge tube
    Patent number: 4441048
    Abstract: A tungsten double coil covered with cathode material made from a paste of carbonate mixed with organic solvent. The coil is mounted around a molybdenum cylinder having a cavity in which a heater is installed.
    Type: Grant
    Filed: February 3, 1982
    Date of Patent: April 3, 1984
    Assignee: Hamamatsu TV Co., Ltd.
    Inventors: Hidetugu Takaoka, Yuji Shimazu