Patents by Inventor Yoshihiro Akita

Yoshihiro Akita 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).

  • Mobile station unit and channel switching method
    Patent number: 5383221
    Abstract: In a mobile radio system including at least one mobile station unit and a plurality of base station units, the mobile station unit communicates with a base station through time-division multiplexed control and communication channels. The mobile station unit includes a line quality detecting section for detecting the deterioration of the line quality occurring during communication, and a control section for controlling the entire unit.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: January 17, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Akita, Masakazu Shirakawa
  • Communication system using unbalanced communication paths
    Patent number: 4815127
    Abstract: A signal communication apparatus is used for a telephone system having a plurality of unbalanced communication paths. A feedback line of each unbalanced communication path is connected to a ground level and each unbalanced communication path including a phase reversing transformer. The phase reversing transformer produces two induced currents in the connected path if a speech signal is transmitted through another path. The induced currents are cancelled due to mutual interference.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: March 21, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuji Sato, Yoshihiro Akita