Patents by Inventor Masahiko Kunii

Masahiko Kunii 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).

  • Modem coupling circuit for power-line carrier
    Patent number: 7019611
    Abstract: A modem coupling circuit comprising: (a) a transformer 1 having a core 1a including a gap formed therein, primary windings N1a, N1b constituting a bifilar wound coil which is wound around the core 1a, forming a single layer and connected to power lines L1, L2, and a secondary winding N2 connected to a transmitting circuit 2 and a secondary winding N3 connected to a receiving circuit 3, the secondary windings N2, N3 holding the single layer of the primary windings between; (b) a coupling capacitor C1 connected to a middle point between first ends of the primary windings, the first ends being not connected to the power lines L1, L2; (c) current limiting resistances R1a, R1b connected to the primary windings N1a, N1b having a bifilar construction; (d) drive resistances R2a, R2b connected to the secondary winding for transmission N2; and (e) terminating resistances R3a, R3b connected to the secondary winding for reception N3.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: March 28, 2006
    Assignees: Honda Electron Co., Ltd., NEC Tokin Corporation
    Inventors: Takashi Kaku, Fumishiro Tsuda, Toshiro Tojo, Toyomi Obikawa, Toshiya Sato, Hideaki Yamauchi, Masahiko Kunii
  • Modem coupling circuit for power-line carrier
    Publication number: 20040263282
    Abstract: A modem coupling circuit comprising: (a) a transformer 1 having a core 1a including a gap formed therein, primary windings N1a, N1b constituting a bifilar wound coil which is wound around the core 1a, forming a single layer and connected to power lines L1, L2, and a secondary winding N2 connected to a transmitting circuit 2 and a secondary winding N3 connected to a receiving circuit 3, the secondary windings N2, N3 holding the single layer of the primary windings between; (b) a coupling capacitor C1 connected to a middle point between first ends of the primary windings, the first ends being not connected to the power lines L1, L2; (c) current limiting resistances R1a, R1b connected to the primary windings N1a, N1b having a bifilar construction; (d) drive resistances R2a, R2b connected to the secondary winding for transmission N2; and (e) terminating resistances R3a, R3b connected to the secondary winding for reception N3.
    Type: Application
    Filed: March 18, 2004
    Publication date: December 30, 2004
    Inventors: Takashi Kaku, Fumishiro Tsuda, Toshiro Tojo, Toyomi Obikawa, Toshiya Sato, Hideaki Yamauchi, Masahiko Kunii