Patents by Inventor Keijiro Miyamoto

Keijiro Miyamoto 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).

  • Communications system and communication method
    Patent number: 7292605
    Abstract: Communications system and communication method which control group communication processes in a more efficient and flexible way. A downstream frame generation means produces a downstream frame for group communication, providing group communication time slots therein. An office-side group communication control means controls communications processes by sending the downstream frame and receiving an upstream frame. An upstream frame generation means produces an upstream frame. A subscriber-side group communication control means controls the group communication processes by sending the upstream frame and receiving the downstream frame.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: November 6, 2007
    Assignee: Fujitsu Limited
    Inventor: Keijiro Miyamoto
  • Communications system and communication method
    Publication number: 20030002535
    Abstract: Communications system and communication method which control group communication processes in a more efficient and flexible way. A downstream frame generation means produces a downstream frame for group communication, providing group communication time slots therein. An office-side group communication control means controls communications processes by sending the downstream frame and receiving an upstream frame. An upstream frame generation means produces an upstream frame. A subscriber-side group communication control means controls the group communication processes by sending the upstream frame and receiving the downstream frame.
    Type: Application
    Filed: August 14, 2002
    Publication date: January 2, 2003
    Inventor: Keijiro Miyamoto