Patents by Inventor Tetsuo Wada

Tetsuo Wada 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).

  • Publication number: 20210403268
    Abstract: A sheet storage apparatus and a printing apparatus include simplified mechanisms for supporting a sheet and for guiding the sheet. A sheet storage device that can store a sheet discharged from a discharge port of a printing apparatus includes multiple flappers provided below the discharge port and arranged in a width direction of the sheet, each flapper being rotatable between a first posture in which the sheet discharged from the discharge port is guided downward in a gravitational direction by using a first surface, and a second posture in which the sheet is supported by using a second surface being different from the first surface; and a connecting unit which connects the plurality of flappers to one another.
    Type: Application
    Filed: September 7, 2021
    Publication date: December 30, 2021
    Inventors: Yasuyuki Asai, Hiromasa Yoneyama, Tetsuo Kikuchi, Itaru Wada, Daiki Anayama
  • Publication number: 20180314311
    Abstract: An apparatus includes a processor that monitors a first operational status of processors, activates one of unactivated processors of the processors, and based on a second operational status of the activated processor, determines an activation timing of a next processor to activate next, and activates the next processor at the activation timing.
    Type: Application
    Filed: April 25, 2018
    Publication date: November 1, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Daijiro Tanaka, Yoshinori Tochiki, Kenichi Yajima, Tetsuo Wada, Minyoung Bang
  • Patent number: 8420216
    Abstract: The thermosetting resin composition according to the present invention includes a resin (A) containing two or more carboxyl groups and having a polyurethane structure, a strongly basic nitrogen-containing heterocyclic compound having pKa of 10.0 to 14.0 as a curing accelerator (B) and a curing agent (C). A cured product of the thermosetting resin composition is used as an insulating protective film for printed wiring boards, flexible printed wiring boards, chip-on-films, etc. The thermosetting resin composition of the invention has improved low-temperature curability and instantaneous curability, can realize tack-free property, can simultaneously realize low warpage property and electrical insulation property, does not contaminate a curing oven and the like by outgassing during heating, has a sufficient pot life, can form excellent cured products and insulating protective films, and can form solder resists and insulating protective films at low cost with good productivity.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: April 16, 2013
    Assignee: Showa Denko K.K.
    Inventors: Tomokazu Umezawa, Tetsuo Wada, Hirofumi Inoue
  • Publication number: 20100186996
    Abstract: The thermosetting resin composition according to the present invention includes a resin (A) containing two or more carboxyl groups and having a polyurethane structure, a strongly basic nitrogen-containing heterocyclic compound having pKa of 10.0 to 14.0 as a curing accelerator (B) and a curing agent (C). A cured product of the thermosetting resin composition is used as an insulating protective film for printed wiring boards, flexible printed wiring boards, chip-on-films, etc. The thermosetting resin composition of the invention has improved low-temperature curability and instantaneous curability, can realize tack-free property, can simultaneously realize low warpage property and electrical insulation property, does not contaminate a curing oven and the like by outgassing during heating, has a sufficient pot life, can form excellent cured products and insulating protective films, and can form solder resists and insulating protective films at low cost with good productivity.
    Type: Application
    Filed: July 11, 2008
    Publication date: July 29, 2010
    Applicant: SHOWA DENKO K.K.
    Inventors: Tomokazu Umezawa, Tetsuo Wada, Hirofumi Inoue
  • Patent number: 7509055
    Abstract: An optical transmission system with automatic startup functions to optimize the power level of optical signals entering each optical amplifier and operate those amplifiers in appropriate mode. In the process of starting up an optical transmission system, upstream and downstream optical transmission devices set up themselves under the coordination of their internal controllers. The downstream device controller adjusts its local variable optical attenuator by utilizing optical noise emission from a post-amplifier in the upstream optical transmission device, and it selects and sets a preamplifier unit to work in appropriate operating mode. The upstream device controller, on the other hand, selects and sets operating mode of its local post-amplifier unit. During this process, the upstream and downstream device controllers exchange messages over supervisory control channels to achieve the purpose.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: March 24, 2009
    Assignee: Fujitsu Limited
    Inventors: Hiroaki Tomofuji, Takuji Maeda, Taizo Maeda, Hideki Kobayashi, Tatsuo Nagayoshi, Tetsuo Wada
  • Publication number: 20090065244
    Abstract: Thermosetting resin compositions are excellent in balance among printability, tack properties, matting properties, electrical insulating properties and adhesion to objects. A thermosetting resin composition includes a thermosetting resin (A) and core-shell multilayer organic fine particles (B).
    Type: Application
    Filed: April 18, 2007
    Publication date: March 12, 2009
    Applicant: SHOWA DENKO K.K.
    Inventors: Kazuya Kimura, Tetsuo Wada
  • Publication number: 20080159753
    Abstract: An optical transmission system with automatic startup functions to optimize the power level of optical signals entering each optical amplifier and operate those amplifiers in appropriate mode. In the process of starting up an optical transmission system, upstream and downstream optical transmission devices set up themselves under the coordination of their internal controllers. The downstream device controller adjusts its local variable optical attenuator by utilizing optical noise emission from a post-amplifier in the upstream optical transmission device, and it selects and sets a preamplifier unit to work in appropriate operating mode. The upstream device controller, on the other hand, selects and sets operating mode of its local post-amplifier unit. During this process, the upstream and downstream device controllers exchange messages over supervisory control channels to achieve the purpose.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 3, 2008
    Applicant: Fujitsu Limited
    Inventors: Hiroaki Tomofuji, Takuji Maeda, Taizo Maeda, Hideki Kobayashi, Tatsuo Nagayoshi, Tetsuo Wada
  • Patent number: 7343102
    Abstract: An optical transmission system with automatic startup functions to optimize the power level of optical signals entering each optical amplifier and operate those amplifiers in appropriate mode. In the process of starting up an optical transmission system, upstream and downstream optical transmission devices set up themselves under the coordination of their internal controllers. The downstream device controller adjusts its local variable optical attenuator by utilizing optical noise emission from a post-amplifier in the upstream optical transmission device, and it selects and sets a preamplifier unit to work in appropriate operating mode. The upstream device controller, on the other hand, selects and sets operating mode of its local post-amplifier unit. During this process, the upstream and downstream device controllers exchange messages over supervisory control channels to achieve the purpose.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: March 11, 2008
    Assignee: Fujitsu Limited
    Inventors: Hiroaki Tomofuji, Takuji Maeda, Taizo Maeda, Hideki Kobayashi, Tatsuo Nagayoshi, Tetsuo Wada
  • Patent number: 7092638
    Abstract: An optical multiplex communication system includes a transmission part and a receiving part, wherein the transmission part includes a transmission quality detecting part which measures and transmits a transmission quality information for the channels based on a request from the transmission part; the receiving part includes a variable optical attenuation part controls the optical signal level for the channels, an optical level setting part controls the variable optical attenuation part based on a setting value, a setting control part adding the setting value to the optical level setting part based on a request for setting.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: August 15, 2006
    Assignee: Fujitsu Limited
    Inventors: Yoshihisa Funami, Tetsuo Wada, Kazumaro Takaiwa, Toshihisa Kyouno, Yasushi Tateno, Yoshiaki Shibayama, Akinori Nishiie
  • Patent number: 7006278
    Abstract: Disclosed is a wavelength-division multiplexing optical transmission system in which an optical lossy medium, optical amplifiers and Raman amplifiers for compensating for loss in the optical lossy medium are cascade-connected. The system includes power-level equalizing means for equalizing optical power levels input to an optical amplifier of a succeeding stage by adjusting excitation ratio of a Raman amplifier; optical-SNR equalizing means for adjusting power levels at a transmitting end to equalize optical SNRs at a receiving end; and correction-value acquisition means for acquiring a correction value that represents an amount of change in power of each wavelength before and after optical-SNR equalization control.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: February 28, 2006
    Assignee: Fujitsu Limited
    Inventors: Takeshi Sakamoto, Tetsuo Wada, Yoshinori Tochiki
  • Patent number: 6937820
    Abstract: The present invention relates to an optical level control method for use in an optical transmission system. In the system, a WDM terminal comprises a multiplexing/demultiplexing unit, an amplifier, an up-direction OSC light transmitting/receiving unit, an up-direction multiplexer, an up-direction branching unit, an amplifier and an APR control unit, and a repeater comprises an up-direction branching unit, an OSC light transmitting/receiving unit, an amplifier, an up-direction multiplexer, a down-direction branching unit, an amplifier, a down-direction multiplexer and an APR control unit. In this configuration, a flexible optical output level control in connection with variation in WDM light level, a selective value irrespective of occurrence of an error stemming from the passage of time and avoidable malfunctions are respectively capable. In addition, a trouble retrieving operator can eliminate the possibility of being exposed to the WDM light.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: August 30, 2005
    Assignee: Fujitsu Limited
    Inventors: Hiroyuki Iwaki, Tetsuo Wada
  • Publication number: 20050158057
    Abstract: An optical transmission system with automatic startup functions to optimize the power level of optical signals entering each optical amplifier and operate those amplifiers in appropriate mode. In the process of starting up an optical transmission system, upstream and downstream optical transmission devices set up themselves under the coordination of their internal controllers. The downstream device controller adjusts its local variable optical attenuator by utilizing optical noise emission from a post-amplifier in the upstream optical transmission device, and it selects and sets a preamplifier unit to work in appropriate operating mode. The upstream device controller, on the other hand, selects and sets operating mode of its local post-amplifier unit. During this process, the upstream and downstream device controllers exchange messages over supervisory control channels to achieve the purpose.
    Type: Application
    Filed: July 26, 2004
    Publication date: July 21, 2005
    Applicant: Fujitsu Limited
    Inventors: Hiroaki Tomofuji, Takuji Maeda, Taizo Maeda, Hideki Kobayashi, Tatsuo Nagayoshi, Tetsuo Wada
  • Patent number: 6870666
    Abstract: A controlling apparatus and a controlling method for a wavelength division multiplexing optical amplifier to reduce the controlling error due to noise light included in the monitoring light. The controlling apparatus branches, by a photocoupler, a portion of WDM signal light amplified by a light level controlling part and separates the branched light into groups of even-numbered channel components and odd-numbered channel components using a wavelength channel separate filter. Monitor signals corresponding to the light powers of the even-numbered group and odd-numbered group, respectively, are generated by respective photoelectric converting parts and LPF's. One of the monitor signals, which corresponds to one of the even-numbered group and the odd-numbered group, is selected by a monitor signal selecting/controlling part and then sent to a comparator.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: March 22, 2005
    Assignee: Fujitsu Limited
    Inventor: Tetsuo Wada
  • Publication number: 20040086279
    Abstract: Disclosed is a wavelength-division multiplexing optical transmission system in which an optical lossy medium, optical amplifiers and Raman amplifiers for compensating for loss in the optical lossy medium are cascade-connected. The system includes power-level equalizing means for equalizing optical power levels input to an optical amplifier of a succeeding stage by adjusting excitation ratio of a Raman amplifier; optical-SNR equalizing means for adjusting power levels at a transmitting end to equalize optical SNRs at a receiving end; and correction-value acquisition means for acquiring a correction value that represents an amount of change in power of each wavelength before and after optical-SNR equalization control.
    Type: Application
    Filed: October 22, 2003
    Publication date: May 6, 2004
    Applicant: Fujitsu Limited
    Inventors: Takeshi Sakamoto, Tetsuo Wada, Yoshinori Tochiki
  • Publication number: 20030147647
    Abstract: An optical multiplex communication system includes a transmission part and a receiving part, wherein the transmission part includes a transmission quality detecting part which measures and transmits a transmission quality information for the channels based on a request from the transmission part; the receiving part includes a variable optical attenuation part controls the optical signal level for the channels, an optical level setting part controls the variable optical attenuation part based on a setting value, a setting control part adding the setting value to the optical level setting part based on a request for setting.
    Type: Application
    Filed: October 15, 2002
    Publication date: August 7, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Yoshihisa Funami, Tetsuo Wada, Kazumaro Takaiwa, Toshihisa Kyouno, Yasushi Tateno, Yoshiaki Shibayama, Akinori Nishiie
  • Publication number: 20030123134
    Abstract: A controlling apparatus and a controlling method for a wavelength division multiplexing optical amplifier to reduce the controlling error due to noise light included in the monitoring light. The controlling apparatus branches, by a photocoupler, a portion of WDM signal light amplified by a light level controlling part and separates the branched light into groups of even-numbered channel components and odd-numbered channel components using a wavelength channel separate filter. Monitor signals corresponding to the light powers of the even-numbered group and odd-numbered group, respectively, are generated by respective photoelectric converting parts and LPF's. One of the monitor signals, which corresponds to one of the even-numbered group and the odd-numbered group, is selected by a monitor signal selecting/controlling part and then sent to a comparator.
    Type: Application
    Filed: December 24, 2002
    Publication date: July 3, 2003
    Applicant: FUJITSU LIMITED
    Inventor: Tetsuo Wada
  • Patent number: 6583909
    Abstract: An optical communication system according to the present invention includes an optical transmission device and a repeater. The repeater has an automatic level controller for performing average level constant control to an optical signal transmitted from the optical transmission device. The optical transmission device has an average level detector for detecting an average level detection signal of the optical signal transmitted to the repeater, and the average level detector transmits the average level detection signal to the repeater. When the automatic level controller of the repeater detects an average level detection signal, the automatic level controller performs average level constant control for the optical signal with reference to the average level detection signal.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: June 24, 2003
    Assignee: Fujitsu Limited
    Inventor: Tetsuo Wada
  • Patent number: 6560008
    Abstract: The present invention aims at providing a controlling apparatus and a controlling method for a wavelength division multiplexing optical amplifier to reduce the controlling error due to the affection of noise light included in the monitoring light to be used for controlling the wavelength division multiplexing optical amplifier, to thereby realize precise controlling of the optical amplifier. To this end, the controlling apparatus for a wavelength division multiplexing optical amplifier according to the present invention: branches, by a photocoupler, a portion of WDM signal light amplified by a light level controlling part; and separates the thus branched light into groups of even-numbered channel components and odd-numbered channel components making use of a wavelength channel separate filter. Further, monitor signals corresponding to the light powers of the even-numbered group and odd-numbered group, respectively, are generated by respective photoelectric converting parts and LPF's.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: May 6, 2003
    Assignee: Fujitsu Limited
    Inventor: Tetsuo Wada
  • Publication number: 20020024690
    Abstract: The present invention relates to an optical level control method for use in an optical transmission system. In the system, a WDM terminal comprises a multiplexing/demultiplexing unit, an amplifier, an up-direction OSC light transmitting/receiving unit, an up-direction multiplexer, an up-direction branching unit, an amplifier and an APR control unit, and a repeater comprises an up-direction branching unit, an OSC light transmitting/receiving unit, an amplifier, an up-direction multiplexer, a down-direction branching unit, an amplifier, a down-direction multiplexer and an APR control unit. In this configuration, a flexible optical output level control in connection with variation in WDM light level, a selective value irrespective of occurrence of an error stemming from the passage of time and avoidable malfunctions are respectively capable. In addition, a trouble retrieving operator can eliminate the possibility of being exposed to the WDM light.
    Type: Application
    Filed: February 26, 2001
    Publication date: February 28, 2002
    Inventors: Hiroyuki Iwaki, Tetsuo Wada
  • Patent number: 6064513
    Abstract: An optical transmission system having a linear repeater section that performs linear amplification of an optical signal, in which some functional redundancy is introduced to improve the reliability of long-distance signal transmission. The optical transmission line is segmented by regenerative repeater devices into a plurality of linear repeater sections, in each of which a plurality of linear optical amplifiers are deployed. The regenerative repeater devices have a signal regeneration unit that regenerates the received optical signals to compensate for their deterioration. The present invention eliminates RSOH termination and insertion functions from the regenerative repeater devices connected to at least one end of each linear repeater section. Further, the present invention deploys a signal regeneration unit in parallel with a linear optical amplifier within each linear repeater section.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: May 16, 2000
    Assignee: Fujitsu Limited
    Inventor: Tetsuo Wada