Patents by Inventor Ko J. Watanabe

Ko J. Watanabe 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).

  • Ink jet recording apparatus for ejecting droplets of ink through promotion of capillary action
    Patent number: 5367324
    Abstract: A thermal ink jet recording apparatus includes at least a substrate having at least a plurality of heating elements disposed in rows in at least two groups. Each group consists of two rows of heating elements, one row arranged on either side of the ink supply portion, each of the groups of the heating elements being associated with a single color ink. At least one nozzle plate has a plurality of nozzles disposed on the substrate where at least one nozzle plate and the substrate define a space between the nozzle plate and the substrate in registration with each group of heating elements and corresponding group of nozzles associated with a single color ink. Means are provided for independently delivering ink of one color from the ink reservoir to each of the spaces, whereby printing can be independently effected in at least two colors of ink.
    Type: Grant
    Filed: September 10, 1992
    Date of Patent: November 22, 1994
    Assignee: Seiko Epson Corporation
    Inventors: Nobumasa Abe, Kiyoharu Momose, Ko J. Watanabe, Yuichi Nakamura, Tsuneo Handa, Mitsutaka Nishikawa