Patents by Inventor Yasuaki Watanabe

Yasuaki Watanabe 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).

  • Patent number: 7867684
    Abstract: A liquid developer includes: an aqueous medium; and a magnetic toner which is substantially dispersed in the aqueous medium and includes a polymer compound and a magnetic powder, the amount of the magnetic powder being from about 0.2 volume % to about 5 volume % with respect to the magnetic toner.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: January 11, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuaki Watanabe, Ryosaku Igarashi, Keitaro Mori
  • Publication number: 20090274973
    Abstract: A liquid developer includes: an aqueous medium; and a magnetic toner which is substantially dispersed in the aqueous medium and includes a polymer compound and a magnetic powder, the amount of the magnetic powder being from about 0.2 volume % to about 5 volume % with respect to the magnetic toner.
    Type: Application
    Filed: January 14, 2009
    Publication date: November 5, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasuaki Watanabe, Ryosaku Igarashi, Keitaro Mori
  • Publication number: 20090262164
    Abstract: A developer supply device, includes: a developer holder; and a developer reservoir which is disposed inside of the developer holder, holds a liquid developer, and has at least one supply section that supplies the liquid developer from the developer reservoir to the developer holder, the liquid developer including a toner and an aqueous medium, and the developer supply device supplying the liquid developer that has been supplied to the developer holder to a medium which is a supply target for the liquid developer.
    Type: Application
    Filed: December 16, 2008
    Publication date: October 22, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Keitaro Mori, Ryosaku Igarashi, Yasuaki Watanabe
  • Publication number: 20090245874
    Abstract: An image forming device contains: a latent image holding member; a latent image forming unit; a developer storage unit that stores a liquid developer including a toner and an aqueous medium; a developer supply member that supplies the liquid developer to a latent image holding member; and a transfer unit that transfers a toner image to a recording medium. The developer supply member has a surface formed of a liquid absorbent member and is disposed such that a part of the liquid absorbent member is immersed in the liquid developer stored in the liquid developer storage unit and that another part of the liquid absorbent member is in contact with and compressed by the latent image holding member. The water repellency of the surface of the latent image holding member is higher than the water repellency of the surface of the developer supply member.
    Type: Application
    Filed: September 15, 2008
    Publication date: October 1, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Keitaro Mori, Ryosaku Igarashi, Yasuaki Watanabe
  • Publication number: 20090017232
    Abstract: The present invention provides a magnetic latent image holding body in which the surface thereof has water repellency and a magnetic latent image is visualized by a liquid developer that contains a magnetic toner and an aqueous medium.
    Type: Application
    Filed: April 3, 2008
    Publication date: January 15, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasuaki Watanabe, Ryosaku Igarashi, Keitaro Mori
  • Patent number: 7123514
    Abstract: A memory device is composed of a memory array including floating gate memory cells; a sense amplifier designed to identify data stored in the memory array; and a reference current setting unit responsive to a trimming code for providing a reference current for the sense amplifier. The trimming code is defined as being all-0 for a reference current level to identify data stored in the memory array as logic “1”, and is defined as being all-1 for a reference current level to identify data stored in the memory array as logic “0”.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: October 17, 2006
    Assignee: NEC Electronics Corporation
    Inventor: Yasuaki Watanabe
  • Publication number: 20050219905
    Abstract: A memory device is composed of a memory array including floating gate memory cells; a sense amplifier designed to identify data stored in the memory array; and a reference current setting unit responsive to a trimming code for providing a reference current for the sense amplifier. The trimming code is defined as being all-0 for a reference current level most likely to identify data stored in the memory array as logic “1”, and is defined as being all-1 for a reference current level most likely to identify data stored in the memory array as logic “0”.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 6, 2005
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Yasuaki Watanabe
  • Patent number: 4907346
    Abstract: A terrestrial magnetic sensor has a bobbin body having a magnetic core inserting groove, a silicon gel filled in the magnetic core inserting groove, a magnetic core buried in the silicon gel filled in the magnetic core inserting groove, and a bobbin cover for closing the magnetic core inserting groove of the bobbin body. Thus, this terrestrial magnetic sensor can suppress the decrease in the magnetic permeability by burying a magnetic core in a silicon gel and can be hardly affected by the influences of the variations in an environmental temperature and an external stress.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: March 13, 1990
    Assignee: Alps Electric Co., Ltd.
    Inventor: Yasuaki Watanabe
  • Patent number: 4833769
    Abstract: A method of manufacturing an armature of an electric rotary machine comprising the step of: fixedly attaching an armature core to a shaft which is a constituent component of the armature; winding armature coils in slots formed in the outer circumference of the armature core, the lower and upper lead-out portions of the armature coils being axially extended to a commutator arrangement space where a commutator is to be arranged; welding the respective end portions of each pair of the upper and lower lead-out end portions so as to join the upper and lower lead-out end portions in each pair with each other under the condition that the upper and lower lead-out end portions in each pair are arranged vertically one on the other and parallelly to each other while securing concave portions at the welding-joined portions to thereby form each of commutator segment portions; arranging the commutator segment portions in alignment at predetermined intervals circumferentially around the shaft; and molding and fixedly attach
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: May 30, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Toshio Tomite, Yasuaki Watanabe
  • Patent number: 4829206
    Abstract: An armature for an electric rotary machine, comprising a laminated iron core including a plurality of slots, and teeth, alternately disposed in the cylindrical surface of the iron core, windings placed in said slots, and anchors for preventing the windings placed in the slots from being displaced, wherein the anchors are formed by deforming the end portions of the teeth, while forming before mounting the windings into the slots, a through hole extending through the end portion of each tooth.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: May 9, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Teruhisa Honshima, Yasuaki Watanabe, Akira Takahachi, Tadayochi Samata, Akira Tohkairin, Nobuhiko Ogasawara
  • Patent number: 4736257
    Abstract: An information signal recording medium reproducing apparatus comprises an equalizer supplied with a frequency modulated composite video signal picked up from an information signal recording medium, a frequency demodulator for frequency-demodulating an output signal of the equalizer into a composite video signal, a synchronizing signal separating circuit for separating a horizontal synchronizing signal from the composite video signal, and a switching signal generating circuit for forming a switching signal from the horizontal synchronizing signal.
    Type: Grant
    Filed: August 13, 1985
    Date of Patent: April 5, 1988
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Yasuaki Watanabe, Kazuo Yamada, Hiroji Ibaraki
  • Patent number: 4577238
    Abstract: An intermodulation distortion reducing circuit for a frequency-modulated signal comprises a sinusoidal wave shaping circuit supplied with an input frequency-modulated signal including an intermodulation distortion component, for shaping the waveform of the input frequency-modulated signal into a waveform closely approximating a sinusoidal wave, and a mean DC level detecting circuit supplied with an output signal of the sinusoidal wave shaping circuit, for detecting a mean DC level of the output signal of the sinusoidal wave shaping circuit and producing a detection output. The sinusoidal wave shaping circuit is supplied with the detection output of the mean DC level detecting circuit and a waveform shaping quantity thereof is varied to obtain the waveform closely approximating the sinusoidal waveform. The sinusoidal wave shaping circuit produces a frequency-modulated signal having a waveform closely approximating a sinusoidal waveform, with its intermodulation distortion component reduced.
    Type: Grant
    Filed: April 22, 1983
    Date of Patent: March 18, 1986
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Yasuaki Watanabe
  • Patent number: 4549225
    Abstract: A reproduced color video signal processing circuit in a rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium which is recorded with a composite color video signal in which a carrier chrominance signal is frequency-converted into a low frequency band and multiplexed using a common frequency band within a part of a frequency band of a luminance signal, and levels of the carrier chrominance signal and a color burst signal are controlled according to the level of the carrier chrominance signal with respect to the color burst signal.
    Type: Grant
    Filed: October 9, 1981
    Date of Patent: October 22, 1985
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Yasuaki Watanabe
  • Patent number: 4541018
    Abstract: A dropout compensation circuit for a reproduced video signal in a reproducing apparatus for reproducing a composite color video signal recorded in a recording medium, wherein the composite color video signal consists of a luminance signal occupying a predetermined frequency band and a carrier chrominance signal multiplexed with a common frequency band at a high frequency part of the luminance signal, comprises an amplitude modulator for amplitude-modulating a carrier by a reproduced composite color video signal, a delay circuit having a frequency band for passing a part excluding a higher frequency part of an upper side band and a lower frequency part of a lower side band of an output amplitude-modulated signal of the amplitude modulator, and delaying the signal by a predetermined delay time, a demodulating circuit for demodulating an output amplitude-modulated signal of the delay circuit, a detection circuit for detecting dropout within the reproduced composite color video signal, a switching circuit switche
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: September 10, 1985
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Yasuaki Watanabe
  • Patent number: 4445143
    Abstract: A rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium by use of a reproducing element. The rotary recording medium is recorded with at least a first carrier signal which is modulated by an information signal having a synchronizing signal of a predetermined frequency.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: April 24, 1984
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Toyotaka Machida, Hitoshi Aoike, Toshimasa Kumazaki, Yasuaki Watanabe, Yuichi Ikemura
  • Patent number: 4406981
    Abstract: A rotation stopping apparatus for a motor comprises a frequency signal generating circuit for generating a signal having a frequency according to a rotational speed of a motor, a voltage forming circuit for forming a voltage according to the frequency of the frequency signal from the frequency signal generating circuit, a motor driving circuit for supplying a forward direction current to the motor upon rotation of the motor and supplying a reverse direction current to the motor when the rotation of the motor is stopped to perform a damping operation with respect to the rotation of the motor, a detecting circuit for detecting that a voltage from the voltage forming circuit has become below a predetermined threshold voltage, and an interrupting circuit for interrupting the supply of the reverse direction current to the motor by the motor driving circuit according to the detected result obtained from the detecting circuit.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: September 27, 1983
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Yasuaki Watanabe, Yukio Okabe
  • Patent number: 4400732
    Abstract: A PCM signal extracting circuit comprises a highpass filter for separating a PCM signal, of a type not including a DC component, inserted between horizontal synchronizing signals within a predetermined interval of a composite video signal or a signal based on the composite video signal, and for obtaining an average DC level of the horizontal synchronizing signal and the PCM signal, an attenuation circuit for attenuating an output signal of the highpass filter by a predetermined quantity according to the modulation factor of the PCM signal, a holding circuit for holding a peak value, at the opposite side from the horizontal synchronizing signal, of the signal attenuated by the attenuation circuit, and a level comparing circuit for comparing the levels of output signals of the highpass filter and the holding circuit, and extracting a signal obtained by slicing the output signal of the highpass filter by the level of the output signal of the holding circuit.
    Type: Grant
    Filed: December 18, 1981
    Date of Patent: August 23, 1983
    Assignee: Victor Company of Japan
    Inventors: Yasuaki Watanabe, Kenji Kaneko
  • Patent number: 4375646
    Abstract: In a color television receiver adapted to receive a color television signal containing vertical interval reference (VIR) signals, a VIR correction circuit is provided to automatically control the hue and color saturation of the received broadcast signal, which may also be coupled to a video tape recorder of the type in which adjacent field signals are recorded with their respective record tracks being skewed relative to each other to permit elimination of otherwise required guardbands between adjacent field tracks. The recorded video signal is reproduced by mixing adjacent horizontal line signals to reduce crosstalk level. A disabling circuit is provided to disable the VIR correction circuit when the receiver is switched to the output of the video tape recorder in playback mode to prevent false VIR signals due to the mixing from affecting the reproduced colors.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: March 1, 1983
    Assignee: Victor Company of Japan, Limited
    Inventors: Yukio Okabe, Yasuaki Watanabe
  • Patent number: 4295165
    Abstract: A television signal discrimination system is used in a television receiver provided with an electronic tuner for producing as output an intermediate-frequency signal whose synchronizing frequency is varied in response to an applied voltage and with a circuit for detecting the output signal of the electronic tuner.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: October 13, 1981
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Yasuaki Watanabe, Teruaki Noda
  • Patent number: RE32194
    Abstract: A rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium by use of a reproducing element. The rotary recording medium is recorded with at least a first carrier signal which is modulated by an information signal having a synchronizing signal of a predetermined frequency.
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: June 24, 1986
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Toyotaka Machida, Hitoshi Aoike, Toshimasa Kumazaki, Yasuaki Watanabe, Yuichi Ikemura