Patents by Inventor Kouichi Kihara

Kouichi Kihara 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).

  • Subscriber line interface circuit in a switching system
    Patent number: 5058111
    Abstract: A subscriber line interface circuit in a packet switched network is capable of reducing the S/N ratio. Voice signals are transmitted and received as analog signals via line terminal circuits which are corrected to respective packet communication signal processing circuits but not to a common bus. In the packet communication signal processing circuits, packet assembly and disassembly, voice signal processing, and line terminal circuit control are carried out in synchronism with the packet communication network. Packet data are transferred serially between the packet communication signal processing circuits and a switch interface circuit.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: October 15, 1991
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Kouichi Kihara, Kazushige Yamamoto