Patents by Inventor Yasuo Yamamoto

Yasuo Yamamoto 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).

  • Image display medium and image forming apparatus
    Patent number: 6950084
    Abstract: An image display medium capable of providing an image display with less change in the image density, with less change in the uniformness of the density and at stable density contrast even after repetitive rewriting over a long period of time, and an image forming apparatus using the image display medium are provided. The image display medium and image forming apparatus have a pair of facing substrates, at least two kinds of particles sealed in a space between the pair of the substrates in which the at least two kinds of particles have a characteristic that at least one kind of them is positively chargeable and at least one other kind of them is negatively chargeable, and the particles chargeable positively and negatively are of colors different from each other and a charge controller is internally added to one or both of the particles chargeable positively and negatively.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: September 27, 2005
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Yamamoto, Chisato Urano, Yoshihiro Inaba, Takeshi Matsunaga, Yoshinori Machida, Kiyoshi Shigehiro
  • Guide system for guiding window glass of vehicle
    Patent number: 6938374
    Abstract: A guide system for guiding a window glass of a vehicle includes a guide rail and a guide. The guide includes a shaft to be attached to the window glass; a base as one part of a component divided in a widthwise direction of the vehicle and contacting an inner surface of the guide rail at an inner side of the vehicle; and a slider slidably attached to the base as the other part of the component and contacting an inner surface of the guide rail at an outer side of the vehicle. An elastic member is disposed between the base and the slider for pressing the slider toward the outside of the vehicle.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: September 6, 2005
    Assignees: Nifco Inc., Fuji Jukogyo Kabushiki Kaisha
    Inventors: Yasuo Yamamoto, Takenori Nishimura, Nobuji Suzuki
  • Particle for display device, method for manufacturing particle for display device, image display medium and image forming apparatus
    Publication number: 20050168800
    Abstract: The invention provides particles for a display device having a positively or negatively chargeable property and color, and the particles have an abundance ratio of amorphous particles with a major axis to minor axis length ratio of approximately 1.2 or greater is approximately 5% or less by number.
    Type: Application
    Filed: September 15, 2004
    Publication date: August 4, 2005
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satoshi Hiraoka, Hidehiko Soyama, Yasuo Yamamoto
  • Drawer device
    Patent number: 6923517
    Abstract: A drawing device includes an outside case with a front opening, an inside case sliding to switch between a pulled-out position and a stored position, and a holder main member sliding to switch between a use position and a non-use position. The inside case includes a first locking member engaging the holder main member when the inside case is at the stored position. Through this engagement, it is possible to prevent the holder main member from sliding alone and allow the inside case and the holder main member to slide to the pulled-out position. When the inside case reaches the pulled-out position, the first locking member automatically releases the engagement to allow the holder main member to slide to the use position.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: August 2, 2005
    Assignee: Nifco Inc.
    Inventor: Yasuo Yamamoto
  • Image display medium and image formation device
    Publication number: 20050151463
    Abstract: The present invention provides an image display medium including a pair of substrates disposed so as to face each other and first and second particles contained in space between the pair of substrates, wherein the first particles can be positively or negatively charged due to external stimulus and have one color and a particle size distribution in which at least one peak is present on a coarse side of the most frequent particle diameter of the first particles, and the second particles are not charged or can be charged due to the external stimulus to have polarity opposite to that of the first particles and have another color: and an image formation device comprising the image display medium and a generator for generating an electric field between the pair of substrates in accordance with an image to be displayed.
    Type: Application
    Filed: August 30, 2004
    Publication date: July 14, 2005
    Applicant: FUJI XEROX CO., LTD
    Inventors: Yasuo Yamamoto, Hidehiko Soyama, Satoshi Hiraoka
  • Carbapenem derivatives
    Patent number: 6908913
    Abstract: An objective of the present invention is to provide carbapenem derivatives which have strong antibiotic activity also against MRSA, PRSP, Influenzavirus, and ?-lactamase producing bacteria and are stable to DHP-1. The carbapenem derivatives according to the present invention are compounds represented by formulae (I) and (II) or pharmaceutically acceptable salts thereof: wherein R1 represents H or methyl, R2 and R3 each independently represent H; halogen; substituted or unsubstituted alkyl; cycloalkyl; substituted or unsubstituted alkylcarbonyl; carbamoyl; substituted or unsubstituted aryl; substituted or unsubstituted alkylthio; morpholinyl; alkylsulfonyl; or formyl, n is 0 (zero) to 4, and Hy represents a substituted or unsubstituted monocyclic or bicyclic heterocyclic group.
    Type: Grant
    Filed: November 22, 2001
    Date of Patent: June 21, 2005
    Assignee: Meiji Seiki Kaisha, Ltd.
    Inventors: Yuko Kano, Yasuo Yamamoto, Takahisa Maruyama, Takehiko Sawabe, Eiki Shitara, Kazuhiro Aihara, Kunio Atsumi, Takashi Ida
  • Particles for display device, producing method thereof, image display medium and image forming apparatus
    Publication number: 20050127330
    Abstract: Particles for a display device including carbon black having a pH of 3.5 or less and having a property of being able to be charged positively or negatively. The particles are produced by at least mixing and stirring an oil phase solution including the carbon black and a compound containing a nitrogen atom, and an aqueous phase solution.
    Type: Application
    Filed: June 4, 2004
    Publication date: June 16, 2005
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satoshi Hiraoka, Hidehiko Soyama, Yasuo Yamamoto
  • Electroluminescent device with sufficient luminous power and driving method thereof
    Patent number: 6888557
    Abstract: An EL device includes a control unit that controls a driving circuit so that a plurality of EL elements emits light several times per driving cycle. Specifically, when a driving voltage is applied to the plurality of EL elements, the plurality of EL elements emits several times per driving cycle. As a result, since the amount of light integrated per time increases, the plurality of EL elements obtains high luminous power even if a plurality of El elements having a very short emission decay time is used.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: May 3, 2005
    Assignee: Denso Corporation
    Inventors: Takashi Inoue, Masayuki Katayama, Yutaka Hattori, Hirotaka Suzuki, Masahiko Osada, Yasuo Yamamoto, Tomoya Uchida
  • Display device particles, process for producing the same, image-display medium, and image-forming device
    Publication number: 20050074680
    Abstract: The present invention provides display device particles that have positive or negative chargeability and have color and are produced using at least a calcium compound, in which a concentration of the calcium compound in the display device particle is 0.05% by weight or less in terms of a calcium element content, a process for producing the display device particles, as well as an image-display medium and an image-forming device each using the display device particles.
    Type: Application
    Filed: June 9, 2004
    Publication date: April 7, 2005
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hidehiko Soyama, Satoshi Hiraoka, Yasuo Yamamoto
  • Image display medium and image forming apparatus
    Publication number: 20050075936
    Abstract: The present invention provides an image display medium comprising a pair of substrates facing each other; and a particle group comprising two or more types of particles sealed in a space between the substrates, at least one of the two or more types of particles being positively chargeable by an external stimulus and at least one other of the two or more types of particles being negatively chargeable by an external stimulus, and the positively chargeable and negatively chargeable particles having, respectively, colors different from each other, wherein the positively chargeable and negatively chargeable particles have particle size distributions satisfying 0.4<Ds/Dl<0.9. Ds represents the particle size distribution of at least one type of particles charged with one polarity and Dl represents that of at least one other type of particles charged with the other polarity.
    Type: Application
    Filed: June 17, 2004
    Publication date: April 7, 2005
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasuo Yamamoto, Satoshi Hiraoka, Hidehiko Soyama, Takeshi Matsunaga
  • Particles for display device, image display medium using the same, and image forming device
    Patent number: 6876486
    Abstract: An image display medium comprises a display substrate on which an image is displayed and a non-displaying substrate opposing to the substrate, wherein a spacer and black particles and white particles are enclosed between these substrates. The display substrate and non-display substrate each have a transparent electrode, wherein the transparent electrode for the non-display substrate is grounded and the transparent electrode for the display substrate is connected to voltage applying means. As these black particles and white particles, particles for a display device having a weight reduction rate of not more than 0.3% at 100° C. to 240° C. are respectively used.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: April 5, 2005
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoshi Hiraoka, Hidehiko Soyama, Yasuo Yamamoto
  • Ink jet printer and method of hardening ink for the printer
    Patent number: 6857734
    Abstract: An inkjet printer for printing a print paper (3) by ejecting a UV-curing type ink through an inkjet print head (5) incorporates an ultraviolet irradiation device (A) for irradiating the ultraviolet light to a target ink position following the ejection of the UV-curing type ink. The device (A) has an ultraviolet light generator (10) for generating the ultraviolet light and optical fibers (11a, 11b) through which the ultraviolet light is guided to a position close to the inkjet print head (5). The ultraviolet light is irradiated through tips of the optical fibers (11a, 11b) in order to cure the UV-curing type ink.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: February 22, 2005
    Assignee: Riso Kagaku Corporation
    Inventor: Yasuo Yamamoto
  • Bush
    Publication number: 20050034267
    Abstract: A bush for holding first and second member includes a shaft portion having two ends, and a flange integrally formed on one of the two ends of the shaft portion to extend radially outwardly therefrom. The flange has at least one first pressing portion capable of deforming in an axial direction of the shaft portion for elastically pressing one of the two second member toward the other.
    Type: Application
    Filed: June 29, 2004
    Publication date: February 17, 2005
    Inventors: Keisuke Fukushima, Yasuo Yamamoto
  • Process for producing display device particles, display device particles, and image-display medium and image-forming device using the same
    Publication number: 20050030610
    Abstract: The present invention provides a process for producing display device particles having positive or negative chargeability and having color, including: at least an emulsification step in which calcium carbonate is added as an emulsifying auxiliary to a display device particle-forming composition that contains a colorant and a polymerizable monomer or a resin, wherein the emulsifying auxiliary is calcium carbonate coated with a hydrophilic organic material, an average dispersed particle size of the emulsifying auxiliary present in an aqueous medium ranges from 0.05 to 1 ?m, a variation coefficient of the dispersed particle sizes is 60% or less, and an electric field generating unit is provided to generate an electric field corresponding to the image.
    Type: Application
    Filed: March 10, 2004
    Publication date: February 10, 2005
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hidehiko Soyama, Satoshi Hiraoka, Yasuo Yamamoto
  • Indole derivatives exhibiting chymase-inhibitory activities and process for preparation thereof
    Patent number: 6852734
    Abstract: According to this invention, there is provided an indole derivative having the general formula (I) wherein A is an oxygen atom or a nitrogen atom which nitrogen atom is optionally substituted with an alkyl group, and (i) R1 and R2 each stand for a hydrogen atom or an alkyl group, independently, or (ii) R1 and R2 as taken together form a cycloalkyl group or an aromatic ring, or (iii) R1 and R2 as taken together form a heterocyclic ring, and R3 is a hydrogen atom, a (C1-C10)alkyl group or others, R4 is a substituted alkyl group and R5 is a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group and so on, as novel compounds by a novel chemical synthetic process. The indole derivative of formula (I) exhibits a useful chymase inhibitory activity.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: February 8, 2005
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Yasuo Yamamoto, Kenzo Hariyama, Yumiko Yanagisawa, Sojiro Shiokawa, Takumi Takeyasu, Osami Takenouchi, Hidenori Kasai
  • Ink jet printer and its thick film printing method
    Patent number: 6846073
    Abstract: An inkjet printer performing printing a print paper (3) by ejecting an UV-curing type ink to the print paper (3) through an inkjet print head (5) includes an ultraviolet irradiation device (A) having an ultraviolet light generation section (10) for generating ultraviolet light and optical fibers (11a, 11b) through which the ultraviolet light generated by the section (10) is guided to a position close to the inkjet print head (5). In the inkjet printer, ink ejection and ink curing are repeated in order to form a thick film, where the inkjet print head (5) performs the ink ejection for ejecting the UV-curing type ink to the print paper (3), and the ultraviolet irradiation device (A) performs the ink curing for curing the ink printed on the print paper (3) immediately following the ink ejection.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: January 25, 2005
    Assignee: Riso Kagaku Corporation
    Inventors: Yasuo Yamamoto, Akiko Hayashi
  • Source sheet for stencil printing, plate manufacturing method, and stencil printing method
    Patent number: 6841233
    Abstract: The invention relates a source sheet for stencil printing comprising: a porous support material; a porous resin film formed on a surface of the porous support material; wherein, the porous support material has a maximum air permeability of 90 s/100 cc; and, the porous resin film has a maximum air permeability of 600 s/100 cc; preferably, the air permeability of the porous support material?the air permeability of the porous resin film. According to the source sheet and plate manufacturing method of the present invention, the plate for the stencil printing can be obtained which is superior in the pore block property and in which the thermal deformation of the source sheet during the plate manufacturing is suppressed.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: January 11, 2005
    Assignee: Riso Kagaku Corporation
    Inventors: Hideyuki Kinoshita, Yasuo Yamamoto, Tsutomu Nio, Toru Nakai, Yuichi Ogawa
  • Assist grip
    Patent number: 6836932
    Abstract: A grip main portion includes supporting members disposed on both sides thereof. An assist grip can be rotated to switch between a non-operational position and an operational position projected into a compartment through the supporting members. An attaching portion of the compartment is provided with the first and second temporary attaching holes. One of the supporting members is provided with a pole protrusion passing freely through the first temporary attaching hole. The other supporting member is provided with an elastic protrusion to be engaged when inserted into the second temporary attaching hole. The elastic protrusion can be pulled out from the second temporary attaching hole when the grip main portion is rotated by a predetermined angle with the pole protrusion being pulled out from the first temporary attaching hole.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: January 4, 2005
    Assignee: Nifco Inc.
    Inventors: Yasuo Yamamoto, Tamotsu Sugiyama
  • Image display medium and image formation apparatus
    Patent number: 6828955
    Abstract: An image display medium capable of displaying an image showing little change of the image density, and also little change of the image density uniformity, and being stable in density contrast, even when repeatedly rewritten over a long period, and an image formation apparatus are provided. The image display medium includes a pair of substrates disposed opposing to each other; and particle groups including at least two types of particles sealed in a space between the pair of the substrates, at least one type thereof having a positively chargeable property, and at least one of others having a negatively chargeable property, and the positively and negatively chargeable types of particles being different colors. The value of a coefficient of variation in each particle size distribution of both the positively and negatively chargeable types of particles is approximately not more than 15%.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: December 7, 2004
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Yamamoto, Chisato Urano, Yoshihiro Inaba
  • Carbapenem derivatives of quarternary salt type
    Patent number: 6825187
    Abstract: An objective of the present invention is to provide carbapenem derivatives which have potent antibiotic activity against MRSA, PRSP, Influenzavirus, and &bgr;-lactamase-producing bacteria and are stable against DHP-1. The compounds according to the present invention are compounds represented by formula (I) or pharmaceutically acceptable salts thereof: wherein R1 represents H or methyl; R2 and R3 each independently represent H, halogen, lower alkyl or the like; R4 represents optionally substituted lower alkylthio or the like; and R5 represents optionally substituted lower alkyl or the like.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: November 30, 2004
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Yuko Kano, Takahisa Maruyama, Yasuo Yamamoto, Eiki Shitara, Toshiro Sasaki, Kazuhiro Aihara, Kunio Atsumi, Katsuyoshi Iwamatsu, Takashi Ida