Patents by Inventor Masazumi Noguchi

Masazumi Noguchi 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).

  • Method and apparatus for multiplex transmission
    Patent number: 7372807
    Abstract: In a transmission network including multiplex transmission units A, F, G, D and E, when the line breakage has occurred on the OC-12 transmission path of the direction from unit A to unit F, the unit F detects the signal coming in from the OC-12 path indicative of the line breakage. The unit F inserts the APS bytes which comes in from the unit A into the undefined area of the OC-192 transport overhead which is reserved for the through-transport of APS bytes, and transports it to the unit G. On receiving the through-transport APS bytes, the unit G inserts it intact into the defined area for the APS bytes in the OC-12 transport overhead, and sends it to the unit D. In this manner, protection switching between the units A and D is carried out.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: May 13, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Masaki Ohira, Masazumi Noguchi, Takashi Mori, Mitsunobu Kimura, Koji Kato
  • Optoelectronic transceiver with power voltage supply detection
    Patent number: 7167654
    Abstract: Optical transmission equipment with more than one power supply which can, when turning on the power supplies, set predetermined function of a signal processing circuit after a predetermined time period after the last turn-on of the power supply and can enable the operation of a drive circuit of the light emitting device after an additional predetermined time period.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: January 23, 2007
    Assignee: OpNext Japan, Inc.
    Inventors: Shigeru Tokita, Tomokazu Tanaka, Cleitus Antony, Tarou Tonoduka, Masazumi Noguchi
  • Method and apparatus for multiplex transmission
    Publication number: 20040184403
    Abstract: In a transmission network including multiplex transmission units A, F, G, D and E, when the line breakage has occurred on the OC-12 transmission path of the direction from unit A to unit F, the unit F detects the signal coming in from the OC-12 path indicative of the line breakage. The unit F inserts the APS bytes which comes in from the unit A into the undefined area of the OC-192 transport overhead which is reserved for the through-transport of APS bytes, and transports it to the unit G. On receiving the through-transport APS bytes, the unit G inserts it intact into the defined area for the APS bytes in the OC-12 transport overhead, and sends it to the unit D. In this manner, protection switching between the units A and D is carried out.
    Type: Application
    Filed: December 9, 2003
    Publication date: September 23, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Masaki Ohira, Masazumi Noguchi, Takashi Mori, Mitsunobu Kimura, Koji Kato
  • Method and apparatus for multiplex transmission
    Patent number: 6721268
    Abstract: In a transmission network including multiplex transmission units A, F, G, D and E, when the line breakage has occurred on the OC-12 transmission path of the direction from unit A to unit F, the unit F detects the signal coming in from the OC-12 path indicative of the line breakage. The unit F inserts the APS bytes which comes in from the unit A into the undefined area of the OC-192 transport overhead which is reserved for the through-transport of APS bytes, and transports it to the unit G. On receiving the through-transport APS bytes, the unit G inserts it intact into the defined area for the APS bytes in the OC-12 transport overhead, and sends it to the unit D. In this manner, protection switching between the units A and D is carried out.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: April 13, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Masaki Ohira, Masazumi Noguchi, Takashi Mori, Mitsunobu Kimura, Koji Kato
  • Optical transmission equipment
    Publication number: 20030228153
    Abstract: Optical transmission equipment with more than one power supply which can, when turning on the power supplies, set predetermined function of a signal processing circuit after a predetermined time period after the last turn-on of the power supply and can enable the operation of a drive circuit of the light emitting device after an additional predetermined time period.
    Type: Application
    Filed: April 17, 2003
    Publication date: December 11, 2003
    Applicant: OpNext Japan, Inc.
    Inventors: Shigeru Tokita, Tomokazu Tanaka, Cleitus Antony, Tarou Tonoduka, Masazumi Noguchi