Patents by Inventor Shu-ichi Sekine

Shu-ichi Sekine 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).

  • Portable type radio equipment
    Publication number: 20050261036
    Abstract: In a radio equipment of portable type, the impedance of an antenna is optimized by adjusting a matching circuit which has the adjustment function and is connected to an antenna, based on a reflection phase sent back from the antenna, outputted from a reflection phase detector, and a current supplied to a transmitter-receiver which generates a transmitting signal.
    Type: Application
    Filed: July 18, 2005
    Publication date: November 24, 2005
    Inventors: Shu-ichi Sekine, Takayoshi Itoh, Yuji Iseki, Naoko Ono, Keiichi Yamaguchi, Hiroyuki Kayano, Akihiro Tsujimura, Kazuhiro Inoue, Noriaki Odachi, Yasushi Murakami
  • Portable type radio equipment
    Patent number: 6934557
    Abstract: In a radio equipment of portable type, the impedance of an antenna is optimized by adjusting a matching circuit which has the adjustment function and is connected to an antenna, based on a reflection phase sent back from the antenna, outputted from a reflection phase detector, and a current supplied to a transmitter-receiver which generates a transmitting signal.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: August 23, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shu-ichi Sekine, Takayoshi Itoh, Yuji Iseki, Naoko Ono, Keiichi Yamaguchi, Hiroyuki Kayano, Akihiro Tsujimura, Kazuhiro Inoue, Noriaki Odachi, Yasushi Murakami
  • Portable type radio equipment
    Publication number: 20030060227
    Abstract: In a radio equipment of portable type, the impedance of an antenna is optimized by adjusting a matching circuit which has the adjustment function and is connected to an antenna, based on a reflection phase sent back from the antenna, outputted from a reflection phase detector, and a current supplied to a transmitter-receiver which generates a transmitting signal.
    Type: Application
    Filed: September 27, 2002
    Publication date: March 27, 2003
    Inventors: Shu-ichi Sekine, Takayoshi Itoh, Yuji Iseki, Naoko Ono, Keiichi Yamaguchi, Hiroyuki Kayano, Akihiro Tsujimura, Kazuhiro Inoue, Noriaki Odachi, Yasushi Murakami