Patents by Inventor Masahiro Maruyoshi

Masahiro Maruyoshi 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).

  • Ring-shaped redundant communication path control method
    Patent number: 7961596
    Abstract: In a ring redundant communication path control method, each of transfer apparatuses periodically transmits an inspection frame for inspecting a communication path, detects a failure of the communication path when the inspection frame is not received for a fixed time, transmits a non-arrival notification frame for notifying that the inspection frame has not arrived yet, and detects a failure of the communication path when the non-arrival notification frame is received.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: June 14, 2011
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Masahiro Maruyoshi, Muneyoshi Suzuki, Kunio Hato, Katsuya Minami
  • RING-SHAPED REDUNDANT COMMUNICATION PATH CONTROL METHOD
    Publication number: 20090073874
    Abstract: In a ring redundant communication path control method, each of transfer apparatuses periodically transmits an inspection frame for inspecting a communication path, detects a failure of the communication path when the inspection frame is not received for a fixed time, transmits a non-arrival notification frame for notifying that the inspection frame has not arrived yet, and detects a failure of the communication path when the non-arrival notification frame is received.
    Type: Application
    Filed: March 27, 2007
    Publication date: March 19, 2009
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORP.
    Inventors: Masahiro Maruyoshi, Muneyoshi Suzuki, Kunio Hato, Katsuya Minami