Patents by Inventor Iida Saburo

Iida Saburo 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).

  • Compact optical switching module including thin-film heaters and trimmed thick-film fixed resistors
    Patent number: 5513285
    Abstract: An optical switching module has an optical waveguide substrate mounted on an electronic circuit substrate. According to a first aspect of the invention, the optical waveguide substrate has thin-film heaters, and the electronic circuit substrate has trimmable thick-film resistors for adjusting current fed to the thin-film heaters. According to a second aspect of the invention, the optical switching module also has a pair of fiber pigtails butt-coupled to the optical waveguide substrate. The fiber pigtails are secured to the ends of a supporter, which is attached to a heat sink fastened below the electronic circuit substrate. According to a third aspect of the invention, the optical waveguide substrate is mounted in a depression in the electronic circuit substrate. The invention reduces the size of the optical switching module.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: April 30, 1996
    Assignees: Oki Electric Industry Co.Ltd., Nippon Telegraph and Telephone Corporation
    Inventors: Toshiyuki Kawashima, Jiro Utsunomiya, Kiyoshi Kurosawa, Iida Saburo, Ryo Nagase, Akira Himeno, Ken-ichi Yukimatsu, Masayuki Okyno, Kuniharu Kato, Masao Kawachi