Patents by Inventor Akira Nishizawa
Akira Nishizawa 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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Publication number: 20080159110Abstract: A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P??/NA, wherein P is a pitch of the convex shaped section, ? is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system.Type: ApplicationFiled: February 20, 2008Publication date: July 3, 2008Applicant: Victor Company of Japan, LimitedInventors: Tetsuya Kondo, Akira Nishizawa
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Patent number: 7366083Abstract: A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P??/NA, wherein P is a pitch of the convex shaped section, ? is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system.Type: GrantFiled: October 10, 2006Date of Patent: April 29, 2008Assignee: Victor Company of Japan, Ltd.Inventors: Tetsuya Kondo, Akira Nishizawa
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Publication number: 20080057812Abstract: The present invention provides a bleachable stretch woven fabric which is excellent in stretchability even after bleaching and a woven product obtained by using the same. A stretch woven fabric characterized by comprising an elastic polyurethane fiber(s) containing two or more metals selected from Mg, Al and Zn in part of a yarn. The metal compound contained in the elastic polyurethane fiber is preferably a composite oxide or a composite hydroxide containing two or more metals, for example, hydrotalcite or a composite oxide obtained by firing hydrotalcite. The stretch woven fabric of the present invention can be suitably used for a bleached stretch denim product.Type: ApplicationFiled: December 5, 2005Publication date: March 6, 2008Applicant: ASAHI KASEI FIBERS CORPORATIONInventors: Keiichi Kataoka, Akira Nishizawa
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Publication number: 20080008079Abstract: A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P??/NA, wherein P is a pitch of the convex shaped section, ? is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system.Type: ApplicationFiled: October 10, 2006Publication date: January 10, 2008Applicant: Victor Company of Japan, LimitedInventors: Tetsuya Kondo, Akira Nishizawa
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Publication number: 20070086290Abstract: A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P??/NA, wherein P is a pitch of the convex shaped section, ? is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system.Type: ApplicationFiled: October 10, 2006Publication date: April 19, 2007Applicant: Victor Company of Japan, LimitedInventors: Tetsuya Kondo, Akira Nishizawa
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Patent number: 7139236Abstract: A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P??/NA, wherein P is a pitch of the convex shaped section, ? is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system.Type: GrantFiled: December 10, 2004Date of Patent: November 21, 2006Assignee: Victor Company Of Japan, LimitedInventors: Tetsuya Kondo, Akira Nishizawa
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Publication number: 20060120260Abstract: An optical disc has a support base and at least one information-retrieval layer formed over the support base. The information-retrieval layer is transparent and thinner than the support base. The information-retrieval layer exhibits variation in birefringence within ±20 nmpp (nano meter peak to peak) under double-pass measurements during one rotation of the optical disc.Type: ApplicationFiled: January 18, 2006Publication date: June 8, 2006Inventors: Akira Nishizawa, Tetsuya Kondo, Takeo Kojima
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Patent number: 7011878Abstract: An optical disc has a support base and at least one information-retrieval layer formed over the support base. The information-retrieval layer is transparent and thinner than the support base. The information-retrieval layer exhibits variation in birefringence within ±20 nmpp (nano meter peak to peak) under double-pass measurements during one rotation of the optical disc.Type: GrantFiled: October 27, 2004Date of Patent: March 14, 2006Assignee: Victor Company of Japan, Ltd.Inventors: Akira Nishizawa, Tetsuya Kondo, Takeo Kojima
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Publication number: 20060024467Abstract: A disk production apparatus has a movable-side metal mold and a fixed-side metal mold provided as facing the movable-side metal mold, the fixed-side metal mold having a center hole. Inserted into the center hole is a retainer to attach a stamper on the fixed-side metal mold. The center of an inner diameter of the retainer and the center of an outer diameter of the retainer are eccentric with each other. The retainer may be inserted into a center hole of the movable-side metal mold for attaching the stamper on the movable-side metal mold. A disk has a substrate having a center hole; a first zone formed on the substrate, data being recorded on the first zone; and a second zone formed on the substrate but outside the first zone. Labeled on the second zone is a marker indicating an amount of eccentricity applied to the retainer used in production of the disk by injection molding.Type: ApplicationFiled: August 11, 2005Publication date: February 2, 2006Inventors: Akira Nishizawa, Takayuki Onizawa, Shinji Ohta
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Publication number: 20060013117Abstract: This invention provides an optical disk effective in both precision and productivity, and to a process for the manufacture thereof. The optical disk allows reading of the information recorded on each information-recording surface of the two or more information-recording surfaces by varying the focal position of a playback laser beam incident on and passing through said light transmitting substrate; and the optical disk is provided with a transparent layer that is laminated onto the light transmitting substrate and is constituted of a thermoplastic resin sheet of uniform thickness and the transparent layer has an information-recording surface other than the surface of said light transmitting substrate formed thereon.Type: ApplicationFiled: September 16, 2005Publication date: January 19, 2006Applicant: JVC Victor Company of Japan, Ltd.Inventors: Tetsuya Kondo, Akira Nishizawa
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Patent number: 6973021Abstract: This invention provides an optical disk effective in both precision and productivity, and to a process for the manufacture thereof. The optical disk allows reading of the information recorded on each information-recording surface of the two or more information-recording surfaces by varying the focal position of a playback laser beam incident on and passing through said light transmitting substrate; and the optical disk is provided with a transparent layer that is laminated onto the light transmitting substrate and is constituted of a thermoplastic resin sheet of uniform thickness and the transparent layer has an information-recording surface other than the surface of said light transmitting substrate formed thereon.Type: GrantFiled: September 16, 2003Date of Patent: December 6, 2005Assignee: JVC Victor Co. of JapanInventors: Tetsuya Kondo, Akira Nishizawa
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Patent number: 6942481Abstract: A disk production apparatus has a movable-side metal mold and a fixed-side metal mold provided as facing the movable-side metal mold, the fixed-side metal mold having a center hole. Inserted into the center hole is a retainer to attach a stamper on the fixed-side metal mold. The center of an inner diameter of the retainer and the center of an outer diameter of the retainer are eccentric with each other. The retainer may be inserted into a center hole of the movable-side metal mold for attaching the stamper on the movable-side metal mold. A disk has a substrate having a center hole; a first zone formed on the substrate, data being recorded on the first zone; and a second zone formed on the substrate but outside the first zone. Labeled on the second zone is a marker indicating an amount of eccentricity applied to the retainer used in production of the disk by injection molding.Type: GrantFiled: May 14, 2003Date of Patent: September 13, 2005Assignee: Victor Company of Japan, Ltd.Inventors: Akira Nishizawa, Takayuki Onizawa, Shinji Ohta
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Publication number: 20050099934Abstract: A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P??/NA, wherein P is a pitch of the convex shaped section, ? is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system.Type: ApplicationFiled: December 10, 2004Publication date: May 12, 2005Applicant: JVC (Victor Company of Japan, Ltd.)Inventors: Tetsuya Kondo, Akira Nishizawa
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Publication number: 20050089668Abstract: An optical disc has a support base and at least one information-retrieval layer formed over the support base. The information-retrieval layer is transparent and thinner than the support base. The information-retrieval layer exhibits variation in birefringence within ±20 nmpp (nano meter peak to peak) under double-pass measurements during one rotation of the optical disc.Type: ApplicationFiled: October 27, 2004Publication date: April 28, 2005Inventors: Akira Nishizawa, Tetsuya Kondo, Takeo Kojima
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Patent number: 6873595Abstract: An information recording medium includes a substrate having a microscopic pattern which has a shape of continous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate, a recording layer that is formed on the microscopic pattern and a light transmitting layer having thickness of 0.05 mm. to 0.12 mm. that is formed on the recording layer. The microscopic pattern is formed so as to satisfy a relation of P??/NA, wherein P is a pitch of the convex shaped section or the concave shaped section, ? is a wavelength of reproducing light beam and NA is a numerical aperture of an objective lens. Further, the microscopic pattern has modulated address information formed on both side walls of the convex shaped section that is viewed from the light transmitting layer side as a wobble having same period and phase.Type: GrantFiled: December 8, 2003Date of Patent: March 29, 2005Assignee: Victor Company of Japan, Ltd.Inventors: Tetsuya Kondo, Akira Nishizawa
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Patent number: 6815032Abstract: An optical disc has a support base and at least one information-retrieval layer formed over the support base. The information-retrieval layer is transparent and thinner than the support base. The information-retrieval layer exhibits variation in birefringence within ±20 nmpp (nano meter peak to peak) under double-pass measurements during one rotation of the optical disc.Type: GrantFiled: September 16, 2002Date of Patent: November 9, 2004Assignee: Victor Company of Japan, LTDInventors: Akira Nishizawa, Tetsuya Kondo, Takeo Kojima
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Publication number: 20040114501Abstract: An information recording medium 11 is at least composed a substrate 8 having microscopic pattern 3C or 3E, which is constituted by a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternately on a surface of the substrate, a recording layer 9 that is formed on the microscopic pattern 3C or 3E and a light transmitting layer 10 having thickness of 0.05 mm to 0.12 mm that is formed on the recording layer 9. The microscopic pattern 3C or 3E is formed so as to satisfy a relation of P≦&lgr;/NA, wherein P is a pitch of the convex shaped section or the concave shaped section, &lgr; is a wavelength of reproducing light beam and NA is a numerical aperture of an objective lens. Further, the microscopic pattern 3C or 3E is characterized in that a modulated address information is formed on both side walls of the convex shaped section that is viewed form the light transmitting layer side as a wobble having same period and phase.Type: ApplicationFiled: December 8, 2003Publication date: June 17, 2004Applicant: JVC (VICTOR COMPANY OF JAPAN, LTD.)Inventors: Tetsuya Kondo, Akira Nishizawa
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Publication number: 20040062186Abstract: This invention provides an optical disk effective in both precision and productivity, and to a process for the manufacture thereof. The optical disk allows reading of the information recorded on each information-recording surface of the two or more information-recording surfaces by varying the focal position of a playback laser beam incident on and passing through said light transmitting substrate; and the optical disk is provided with a transparent layer that is laminated onto the light transmitting substrate and is constituted of a thermoplastic resin sheet of uniform thickness and the transparent layer has an information-recording surface other than the surface of said light transmitting substrate formed thereon.Type: ApplicationFiled: September 16, 2003Publication date: April 1, 2004Applicant: JVC Victor Company of Japan, Ltd.Inventors: Tetsuya Kondo, Akira Nishizawa
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Patent number: 6693873Abstract: An information recording medium includes a substrate having a microscopic pattern which has a shape of continous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate, a recording layer that is formed on the microscopic pattern and a light transmitting layer having thickness of 0.05 mm to 0.12 mm that is formed on the recording layer. The microscopic pattern is formed so as to satisfy a relation of P≦&ggr;/NA, wherein P is a pitch of the convex shaped section or the concave shaped section, &ggr; is a wavelength of reproducing light beam and NA is a numerical aperture of an objective lens. Further, the microscopic pattern has modulated address information formed on both side walls of the convex shaped section that is viewed from the light transmitting layer side as a wobble having same period and phase.Type: GrantFiled: May 1, 2002Date of Patent: February 17, 2004Assignee: Victor Company of Japan, Ltd.Inventors: Tetsuya Kondo, Akira Nishizawa
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Patent number: 6676791Abstract: This invention provides an optical disk effective in both precision and productivity, and to a process for the manufacture thereof. The optical disk allows reading of the information recorded on each information-recording surface of the two or more information-recording surfaces by varying the focal position of a playback laser beam incident on and passing through said light transmitting substrate; and the optical disk is provided with a transparent layer that is laminated onto the light transmitting substrate and is constituted of a thermoplastic resin sheet of uniform thickness and the transparent layer has an information-recording surface other than the surface of said light transmitting substrate formed thereon.Type: GrantFiled: September 22, 2000Date of Patent: January 13, 2004Assignee: JVC Victor Company of Japan, Ltd.Inventors: Tetsuya Kondo, Akira Nishizawa