Patents by Inventor Tsunetaka Sakata

Tsunetaka Sakata 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's circuit for time division switching system
    Patent number: 4592046
    Abstract: A click tone removing system for a time division switching system which performs switching of speech channels by a highway switch inserted in a highway. When a hook information detector and a dial information detector detect hook information and a dial information, respectively, delivery of a PCM speech sending signal to the highway is prevented by a blocking function for a fixed period of time, so that the highway is controlled to switch the speech channel, thereby removing a click tone generated by dialing.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: May 27, 1986
    Assignee: Iwasaki Tsushinki Kabushiki Kaisha
    Inventors: Yoshihiro Kawata, Tsunetaka Sakata, Teruo Matsufuji, Tetsuro Inomata, Hiroyuki Miyashita
  • Facsimile connection system
    Patent number: 4558369
    Abstract: A facsimile connection system, which is provided with a plurality of facsimile terminal equipments having no CO line interface circuit, at least one facsimile signal processor having a CO line interface circuit, and an exchange for interconnecting the plurality of facsimile terminal equipments and the facsimile signal processor, so that the facsimile terminal equipments can use the facsimile signal processor in common to them. An additional information generator may be further provided in common to the facsimile terminal equipments so as to be connected to the exchange.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: December 10, 1985
    Assignee: Iwasaki Tsushinki Kabushiki Kaisha
    Inventors: Masaru Shinohara, Makoto Ueno, Tsunetaka Sakata