Patents by Inventor Yoshio Hayashi
Yoshio Hayashi 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).
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Patent number: 6703021Abstract: Screening of the autoantibodies and autoantigens which are specific to Sjögren's syndrome, particularly primary Sjögren's syndrome, and provision of a prophylactic and therapeutic drug for Sjögren's syndrome, particularly primary Sjögren's syndrome, and a highly sensitive diagnostic agent for Sjögren's syndrome. The &agr;-fodrin or &agr;-fodrin fragment of the invention is an antigen to the autoantibodies specifically found in Sjögren's syndrome and this autoantigen finds application as a prophylactic and therapeutic drug for autoimmune diseases, particularly Sjögren's syndrome, or a diagnostic agent for such diseases.Type: GrantFiled: February 8, 2000Date of Patent: March 9, 2004Inventors: Yoshio Hayashi, Hiromu Sugino
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Patent number: 6577564Abstract: An optical pickup device includes a semiconductor laser for emitting forward and backward laser light from front and back emergent end faces thereof, focusing device for focusing the forward laser light emergent from the front emergent end face of said semiconductor laser onto an optical recording medium, a light-receiving element for signal reproduction for detecting return light from the optical recording medium, and a light-guiding system for guiding the return light to said light-receiving element for signal reproduction, said optical pickup device being provided with a light source unit having an arrangement in which said semiconductor laser and said light-receiving element for signal reproduction being incorporated in a common package and shielding device, disposed inside said package of said light source unit, for preventing the light emitted from said semiconductor laser from being incident upon said light-receiving element for signal reproduction.Type: GrantFiled: July 15, 2002Date of Patent: June 10, 2003Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Tadashi Takeda, Hisahiro Ishihara, Yoshio Hayashi, Taminori Masuzawa, Yuichi Takei
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Patent number: 6552317Abstract: A phase difference plate (12) converts states of polarization of emergent light form a laser light source (13) and return light form an optical recording medium (5). A diffractive element (21) separates the return light from an optical axis leading from the laser light source (13) to the optical recording medium (5), and guides the return light to a photodetector (14) on the basis of a difference between the states of polarization of the emergent light and the return light. The polarization direction of emergent light from the laser light source (13) is arranged so as to be oriented in the radial direction of the optical recording medium (5) (in the direction of birefringence of the optical recording medium).Type: GrantFiled: June 13, 2000Date of Patent: April 22, 2003Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Tadashi Takeda, Yuichi Takei, Yoshio Hayashi
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Publication number: 20030055073Abstract: It was found that an inducible nitric oxygen synthase (i-NOS) inhibitor is effective for Sjögren's syndrome, and based on this knowledge, an agent for treating and/or preventing Sjögren's syndrome comprising the i-NOS inhibitor as an active ingredient has been completed.Type: ApplicationFiled: August 9, 2002Publication date: March 20, 2003Inventor: Yoshio Hayashi
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Publication number: 20020181373Abstract: An optical pickup device includes a semiconductor laser for emitting forward and backward laser light from front and back emergent end faces thereof, focusing device for focusing the forward laser light emergent from the front emergent end face of said semiconductor laser onto an optical recording medium, a light-receiving element for signal reproduction for detecting return light from the optical recording medium, and a light-guiding system for guiding the return light to said light-receiving element for signal reproduction, said optical pickup device being provided with a light source unit having an arrangement in which said semiconductor laser and said light-receiving element for signal reproduction being incorporated in a common package and shielding device, disposed inside said package of said light source unit, for preventing the light emitted from said semiconductor laser from being incident upon said light-receiving element for signal reproduction.Type: ApplicationFiled: July 15, 2002Publication date: December 5, 2002Applicant: KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHOInventors: Tadashi Takeda, Hisahiro Ishihara, Yoshio Hayashi, Taminori Masuzawa, Yuichi Takei
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Patent number: 6445671Abstract: An optical pickup device includes a semiconductor laser for emitting forward and backward laser light from front and back emergent end faces thereof, focusing device for focusing the forward laser light emergent from the front emergent end face of said semiconductor laser onto an optical recording medium, a light-receiving element for signal reproduction for detecting return light from the optical recording medium, and a light-guiding system for guiding the return light to said light-receiving element for signal reproduction, said optical pickup device being provided with a light source unit having an arrangement in which said semiconductor laser and said light-receiving element for signal reproduction being incorporated in a common package and shielding device, disposed inside said package of said light source unit, for preventing the light emitted from said semiconductor laser from being incident upon said light-receiving element for signal reproduction.Type: GrantFiled: June 30, 1999Date of Patent: September 3, 2002Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Tadashi Takeda, Hisahiro Ishihara, Yoshio Hayashi, Taminori Masuzawa, Yuichi Takei
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Patent number: 6438075Abstract: A returning light beam from an optical disc is divided by a separating diffractor in the directions perpendicular to a track direction of the optical recording medium, and according to respective illuminances of the divided light beams, a deviation amount of an objective lens to an optical axis is detected. By feedback-controlling an objective lens driver by using the information of the detected deviation amount, the objective lens can be made to become stationary at the desired position in a short time. Accordingly, a time period required for the oscillation attenuation of the objective lens can be shortened, thereby, a time period for the reproduction can be shortened.Type: GrantFiled: December 2, 1999Date of Patent: August 20, 2002Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Tadashi Takeda, Yoshio Hayashi, Taminori Masuzawa
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Patent number: 6403007Abstract: Method for manufacturing a plate boehmite and a plate alumina having high catalytic activity. The plate boehmite is prepared by subjecting at least one kind of an alkaline earth metal compound, which is selected from calcium, strontium and barium, and aluminum hydroxide to pressurization and heating at 150 to 300° C. in the presence of water. The resulting reaction product is treated with an acid to remove the residual alkaline earth metal compound contained in the product, followed by rinsing with water. The resulting plate boehmite is subjected to calcination at 450 to 1500° C. Thus, a plate alumina comprising a mixture of &thgr;-alumina and &dgr;-alumina as a major component is prepared.Type: GrantFiled: September 15, 1999Date of Patent: June 11, 2002Assignee: Kawai-Lime Ind. Co. Ltd.Inventors: Kenji Kido, Kaichi Fujiyoshi, Yasuhiro Nishigaki, Yoshio Hayashi
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Publication number: 20010007661Abstract: Screening of the autoantibodies and autoantigens which are specific to Sjögren's syndrome, particularly primary Sjögren's syndrome, and provision of a prophylactic and therapeutic drug for Sjögren's syndrome, particularly primary Sjögren's syndrome, and a highly sensitive diagnostic agent for Sjögren's syndrome. The &agr;-fodrin or &agr;-fodrin fragment of the invention is an antigen to the autoantibodies specifically found in Sjögren's syndrome and this autoantigen finds application as a prophylactic and therapeutic drug for autoimmune diseases, particularly Sjögren's syndrome, or a diagnostic agent for such diseases.Type: ApplicationFiled: February 8, 2000Publication date: July 12, 2001Inventors: Yoshio Hayashi, Hiromu Sugino
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Patent number: 6184512Abstract: A semiconductor laser apparatus comprises a semiconductor substrate, a semiconductor laser which is fixed on the semiconductor substrate and a prism having a slanted plane. The prism is placed such that its slanted plane faces a side across from the semiconductor laser. The apparatus also includes an optical detector for monitoring which is formed on the surface of the semiconductor substrate. The surface is covered by the prism. The following are formed on the slanted plane of the prism: a reflection region on which the surface is processed for reflecting a part of an emitted light beam from the semiconductor laser and a transmissive refraction region on which the surface is processed such that the remaining part of the emitted light beam is transmitted and refracted to be guided to a light receiving plane of the optical detector for monitoring.Type: GrantFiled: May 20, 1998Date of Patent: February 6, 2001Assignee: Sankyo Seiki Mfg. Co., Ltd.Inventors: Kazuo Higashiura, Yoshio Hayashi, Tadashi Takeda
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Patent number: 6151288Abstract: An optical head assembly comprises a laser light source, an objective lens for converging a laser light emitted from the laser light source on an optical recording medium, an optical detector for detecting a returning light from the optical recording medium, a diffraction unit mounted in an optical path between the laser light source and objective lens for positioning multiple diffraction grating means, a base of the optical head assembly for supporting the objective lens, the laser light source and the optical detector, and a diffraction grating unit retaining portion formed on the base for holding the diffraction grating unit.Type: GrantFiled: July 14, 1998Date of Patent: November 21, 2000Assignee: Sankyo Seiki Mfg. Co., Ltd.Inventors: Yuichi Takei, Tadashi Takeda, Yoshio Hayashi
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Patent number: 6121057Abstract: Screening of the autoantibodies and autoantigens which are specific to Sjogren's syndrome, particularly primary Sjogren's syndrome, and provision of a prophylactic and therapeutic drug for Sjogren's syndrome, particularly primary Sjogren's syndrome, and a highly sensitive diagnostic agent for Sjogren's syndrome. The .alpha.-fodrin or .alpha.-fodrin fragment of the invention is an antigen to the autoantibodies specifically found in Sjogren's syndrome and this autoantigen finds application as a prophylactic and therapeutic drug for autoimmune diseases, particularly Sjogren's syndrome, or a diagnostic agent for such diseases.Type: GrantFiled: May 13, 1998Date of Patent: September 19, 2000Assignees: Takeda Chemical Industries, Ltd., Yoshio HayashiInventors: Yoshio Hayashi, Hiromu Sugino
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Patent number: 6016300Abstract: An optical pickup head apparatus for reading information signals from a recording medium having a laser beam light source, an objective lens and a photodetector, the improvement comprises a holographic optical element constructed of a pair of diffraction gratings having different diffractive conditions wherein the element is split into two by a split line near its optical axis as a border and a diffraction generation prevention device for preventing the generation of unwanted diffracted beams from a recording medium. The optical pickup head apparatus irradiates a laser beam emitted from the light source onto a recording medium via the holographic optical element and the objective lens. Beams reflected from the recording medium are guided to the photodetector via the objective lens and the holographic optical element.Type: GrantFiled: July 13, 1998Date of Patent: January 18, 2000Assignee: Sankyo Seiki Mfg. Co., Ltd.Inventors: Tadashi Takeda, Yoshio Hayashi, Hideo Takezoe, Ken Ishikawa
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Patent number: 5866592Abstract: Compounds of the following general formula (I) and pharmaceutically acceptable salts thereof.Type: GrantFiled: June 25, 1997Date of Patent: February 2, 1999Assignees: Nippon Steel Corporation, Nippon Steel Chemical Co., Ltd.Inventors: Yoshio Hayashi, Takeo Harada, Jun Katada, Akira Tachiki, Takeo Okazaki, Yoshimi Satoh, Hiroshi Miyazaki, Tohru Asari
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Patent number: 5828643Abstract: An optical pickup head apparatus for reading information signals from a recording medium having a laser beam light source, an objective lens and a photodetector, the improvement comprises a holographic optical element constructed of a pair of diffraction gratings having different diffractive conditions wherein the element is split into two by a split line near its optical axis as a border and a diffraction generation prevention device for preventing the generation of unwanted diffracted beams from a recording medium. The optical pickup head apparatus irradiates a laser beam emitted from the light source onto a recording medium via the holographic optical element and the objective lens. Beams reflected from the recording medium are guided to the photodetector via the objective lens and the holographic optical element.Type: GrantFiled: June 19, 1996Date of Patent: October 27, 1998Assignee: Sankyo Seiki Mfg. Co., Ltd.Inventors: Tadashi Takeda, Yoshio Hayashi, Hideo Takezoe, Ken Ishikawa
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Patent number: 5793733Abstract: A polarizing beam-splitter comprises an optically isotropics crystalline substrate and a birefringent material layer made of an oriented polydiacetylene film formed on the optically isotropic crystalline substrate. A periodic grating photo-mask is formed in the birefringent material layer by an area that is changed into a different color phase when an ultra violet light is irradiated in a predetermined pattern on the birefringent material layer and by an area in which the color remains unchanged. The periodic grating photo-mask has a diffraction efficiency for the orientation of the oriented polydiacetylene film in the area that is changed into a different color phase which is lower than that in the area in which the color is unchanged.Type: GrantFiled: August 23, 1996Date of Patent: August 11, 1998Assignee: Sankyo Seiki Mfg. Co., Ltd.Inventors: Tadashi Takeda, Yoshio Hayashi, Satoru Nakao, Hideo Takezoe, Ken Ishikawa, Takaaki Suzuki, Atsuo Fukuda
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Patent number: 5761174Abstract: An optical pickup device includes a light source irradiating a record medium with plural light spots of light emitted therefrom, a plurality of light detecting elelments to which reflected light of the light spots are guided, respectively, to adequately synthesize and compare outputs of said light detecting elements, thereby reading information recorded in tracks of the record medium, and detecting an tracking error and a focusing error, and a hologram element which splits light emitted from the light source into plural beams is disposed in an optical path between the light source and the record medium, said hologram element is split by a split line, said split line elongating in a direction perpendicular to a track of the medium on an optical axis, and a hologram pattern having a diffraction function which is substantially directed in the track direction is disposed on at least one side of said split line, thereby differentiating diffraction conditions on both sides of said split line from each other.Type: GrantFiled: September 5, 1995Date of Patent: June 2, 1998Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Tadashi Takeda, Yoshio Hayashi, Ikuo Kasuga, Kazuo Higashiura, Noriyuki Satoh, Hisahiro Ishihara
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Patent number: 5739952Abstract: A polarizing beam splitter includes: an optically isotropic substrate; a layer of birefringent material formed on top of said optically isotropic substrate; and a periodic pattern of ridges and grooves formed on a surface of said optically isotropic substrate to make a grating; and a refractive index equal to either the refractive index of the birefringent material for ordinary light or the index for extraordinary light, said grooves being filled with the material.Type: GrantFiled: April 14, 1995Date of Patent: April 14, 1998Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Tadashi Takeda, Yoshio Hayashi, Hideo Takezoe, Ken Ishikawa
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Patent number: 5721213Abstract: The present invention provides compounds and salts thereof, that are represented by the formula:Pro-Ser-A-B-Asp-C-Dwherein A is an amino acid which does not contain a guanidino group as a side chain, B is a amino acid, C is a hydrophobic amino acid and D is a hydroxy group or an amino acid. The compounds of the invention have excellent platelet aggregation inhibiting and blood coagulation inhibiting activities. Also provided are reagents, pharmaceutical compositions and methods for inhibiting platelet aggregation and blood coagulation.Type: GrantFiled: January 30, 1996Date of Patent: February 24, 1998Assignee: Nippon Steel CorporationInventors: Yoshimi Sato, Yoshio Hayashi, Jun Katada
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Patent number: 5687152Abstract: A tracking error signal and a focus error signal can be obtained with those components of the light (plus and minus first-order light) which have been diffracted by a hologram device whereas the undiffracted zero-order light component is for the sole purpose of producing RF signals. As a result, RF signals can be detected without using a segmented photodetector while insuring that output signals of a constant intensity are produced even if there are changes in the spot diameter and position. In addition, any aberrations that are caused by an half-mirror are corrected by optics that is provided in the optical path connecting the half-mirror and the light-receiving elements of a photodetector and this insures that even if an objective lens moves, detection spots on the individual light-receiving elements will move on the latter without causing any offset errors.Type: GrantFiled: October 25, 1995Date of Patent: November 11, 1997Assignee: Kabushiki Kaisha Sankyo Seiki SeisakushoInventors: Tadashi Takeda, Yoshio Hayashi