Patents by Inventor Toru Maruno

Toru Maruno 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).

  • Guided-wave circuit module and wave-guiding optical component equipped with the module
    Patent number: 5327517
    Abstract: A guided-wave circuit module includes a guided-wave circuit chip having an input waveguide part and an output waveguide part at the ends thereof, a guided-wave circuit part having a predetermined function and positioned between the input waveguide part and the output waveguide part; and a holder for supporting the guided-wave circuit chip, wherein the guided-wave circuit part of the guided-wave circuit chip does not come in contact with the chip holder; at least part of the input and output waveguide parts of the guided-wave circuit chip is fixed to the holder with a fixing agent; and the packaged chip does not have a warp which leads to deterioration of characteristics. A fixing agent having a high hardness is applied to the periphery of the endfaces of the input and output waveguide parts of the guided-wave circuit module and to the periphery of the fiber endfaces of the optical fiber array connected to the module.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: July 5, 1994
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yasufumi Yamada, Fumiaki Hanawa, Kuniharu Kato, Yasuyuki Inoue, Masayuki Okuno, Toru Maruno, Tetsuo Yoshizawa, Takao Kimura