Patents by Inventor Atsushi Morohashi

Atsushi Morohashi 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).

  • Apparatus and method for switching between redundant communication devices
    Patent number: 8693313
    Abstract: A packet is transmitted from a transmitting device to an active communication device which transmits a reception history identifying the received packets to the transmitting device. The transmitting device transmits an active-mode request message to a standby communication device when having failed to receive the reception history from the active communication device within a predetermined time period. Then, the standby communication device becomes a new active communication device, and the active communication device becomes an old active communication device. The new active communication device transmits to the transmitting device a switching request message for switching a destination of the packet from the old active communication device to the new active communication device.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: April 8, 2014
    Assignee: Fujitsu Limited
    Inventors: Katsuhiko Negoto, Akihiro Kameda, Isamu Fukuda, Atsushi Morohashi, Toshifumi Inoue, Kiyohisa Hoshino, Nobuyuki Fukuda, Kenji Fukuda, Kazuhiro Yasuno
  • COMMUNICATION APPARATUS AND METHOD AND COMMUNICATION SYSTEM
    Publication number: 20130003975
    Abstract: A communication apparatus that performs encrypted communication of data to an opposing apparatus, the communication apparatus comprising, a communication unit which uses an encryption key to perform encrypted communication of the data, a rekey unit which updates the encryption key; and a control unit which, after it is confirmed that communication using the encryption key after updating has been enabled, starts encrypted communication of the data using the encryption key after updating.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 3, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Isamu FUKUDA, Atsushi MOROHASHI
  • APPARATUS AND METHOD FOR SWITCHING BETWEEN REDUNDANT COMMUNICATION DEVICES
    Publication number: 20110299386
    Abstract: A packet is transmitted from a transmitting device to an active communication device which transmits a reception history identifying the received packets to the transmitting device. The transmitting device transmits an active-mode request message to a standby communication device when having failed to receive the reception history from the active communication device within a predetermined time period. Then, the standby communication device becomes a new active communication device, and the active communication device becomes an old active communication device. The new active communication device transmits to the transmitting device a switching request message for switching a destination of the packet from the old active communication device to the new active communication device.
    Type: Application
    Filed: November 30, 2010
    Publication date: December 8, 2011
    Applicant: FUJITSU LIMITED
    Inventors: Katsuhiko Negoto, Akihiro Kameda, Isamu Fukuda, Atsushi Morohashi, Toshifumi Inoue, Kiyohisa Hoshino, Nobuyuki Fukuda, Kenji Fukuda, Kazuhiro Yasuno