Patents by Inventor Yukichi Tatsumi

Yukichi Tatsumi 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).

  • Private branch exchange (PBX) system, private branch exchange, and method of communication using the same PBX system
    Patent number: 6788778
    Abstract: A private branch exchange (PBX) system includes plural extension telephones divided into extension groups, and a PBX which sends information about one of the extension group to a caller. Plural extension interfaces (I/Fs) coupling the extension telephones to the PBX are divided into groups. The PBX calls each of the extension telephones coupled to all the extension I/Fs of the extension groups corresponding to a call-in signal. In the PBX, a memory stores text data about the extension groups. A controller sends the text data about the extension group to a caller's telephone responsive to the call-in signal. The information can be thus displayed on an extension telephone or an outside-line telephone of the caller.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: September 7, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Yukichi Tatsumi
  • Private branch exchange (PBX) system, private branch exchange, and method of communication using the same PBX system
    Publication number: 20020064275
    Abstract: A private branch exchange (PBX) system includes plural extension telephones divided into extension groups, and a PBX which sends information about one of the extension group to a caller. Plural extension interfaces (I/Fs) coupling the extension telephones to the PBX are divided into groups. The PBX calls each of the extension telephones coupled to all the extension I/Fs of the extension groups corresponding to a call-in signal. In the PBX, a memory stores text data about the extension groups. A controller sends the text data about the extension group to a caller's telephone responsive to the call-in signal. The information can be thus displayed on an extension telephone or an outside-line telephone of the caller.
    Type: Application
    Filed: November 20, 2001
    Publication date: May 30, 2002
    Inventor: Yukichi Tatsumi