Patents by Inventor Toshio Makita

Toshio Makita 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).

  • Method of manufacturing color screen structure for a cathode ray tube
    Patent number: 4857027
    Abstract: A method of manufacturing a color screen structure for a CRT. The color screen structure comprises a frame consisting of a pair of parallel supporting members and a pair of connecting members interconnecting the pair of supporting members at the opposite ends thereof, and a color screen member provided with a plurality of parallel slits in the color screening region thereof, a pair of slots formed outside the color screening region respectively alongside the opposite outermost slits, and a pair of grooves previously formed respectively along lines corresponding to the outer upper edges of the supporting members of the frame. The color screen member is welded to the supporting members of the frame so that the grooves extend respectively alongisde the outer upper edges of the supporting members, and then the unnecessary portions of the color screening member are torn off along the grooves.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: August 15, 1989
    Assignee: Sony Corporation
    Inventors: Toshio Makita, Koichi Tago