Patents by Inventor Yasunori Yamatani

Yasunori Yamatani 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).

  • Patent number: 4672662
    Abstract: A switching system for a network having terminal control equipment units connected to a network termination unit, in which terminal control equipment units of the same kind are connected with an exchange through a subscriber's line which has assigned to it a single subscriber number and which has a plurality of communication channels. The system including storage units for each terminal control equipment unit of the subscriber's line for storing call status of incoming calls. When a first incoming call is received, the storage units of the terminal control equipment units set respective call status for the first incoming call to a ringing state. When a second incoming call is received before a response to the first incoming call is transmitted, the storage units also set the call status for the second incoming call to a ringing state.
    Type: Grant
    Filed: May 15, 1985
    Date of Patent: June 9, 1987
    Assignee: Fujitsu Limited
    Inventors: Tetsuo Nishino, Hiroko Okamura, Yasunori Yamatani