Patents by Inventor Masaaki Hirota

Masaaki Hirota 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).

  • Methods of manufacturing heater and cathode-ray tube comprising the same
    Patent number: 6294065
    Abstract: A method of manufacturing a heater comprises: (a) washing alumina particles with warm running-water of at least 40° C.; (b) preparing a suspension for electrodeposition by suspending the washed alumina particles in a predetermined liquid; and (c) forming an alumina insulating layer made of the alumina particles on a metal wire as a heater base metal provided inside a cathode of an electron gun by electrophoresis using the suspension for electrodeposition.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: September 25, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masaki Kawasaki, Masaaki Hirota, Yoshio Hamaguchi, Takeshi Hashimoto, Yoji Yamamoto