Patents by Inventor Akiyoshi Ikenaga

Akiyoshi Ikenaga 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).

  • Color fluorescent luminous tube
    Patent number: 4608518
    Abstract: A color fluorescent luminous tube is disclosed which is capable of eliminating a problem of cathode poisoning to significantly lengthen the life of the tube. The color fluorescent luminous tube includes getter devices provided to diffuse a part of a getter material toward luminous cells to deposit it as a film on regions adjacent to the luminous cells, so that the film catches impurity gas generated from the luminous cells due to the impingement of electrons thereupon before it reaches a cathode.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: August 26, 1986
    Assignee: Futaba Denshi Kogyo K. K.
    Inventors: Tatsuo Fukuda, Akiyoshi Ikenaga