Patents by Inventor Junichi Aita

Junichi Aita 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).

  • Channel division control equipment of the ISDN primary rate interface circuit
    Patent number: 6507578
    Abstract: An ISDN primary rate interface circuit having a plurality of communication channels, includes a channel division controller. According to predetermined conditions, the channel division controller selects a communication channel out of the plurality of communication channels when generating or receiving a call. The channel division controller provides private branch exchange by enabling allocation of the selected communication channel to an extension group according to a predetermined condition when generating or receiving the call.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: January 14, 2003
    Assignee: Hitachi Telecom Technologies, LTD.
    Inventors: Sakae Nagayama, Kiyokazu Sanpei, Junichi Aita
  • Channel division control equipment of the ISDN primary rate interface circuit
    Patent number: 6141343
    Abstract: An ISDN primary rate interface circuit having a plurality of communication channels, includes a channel division controller. According to predetermined conditions, the channel division controller selects a communication channel out of the plurality of communication channels when generating or receiving a call. The channel division controller provides private branch exchange by enabling allocation of the selected communication channel to an extension group according to a predetermined condition when generating or receiving the call.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: October 31, 2000
    Assignee: Hitachi Telecom Technologies, Ltd.
    Inventors: Sakae Nagayama, Kiyokazu Sanpei, Junichi Aita