Patents by Inventor Takao Tagiri
Takao Tagiri 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: 11018403Abstract: An electromagnetic wave transmission cable for transmitting an electromagnetic wave comprises a hollow waveguide tube and a foamed resin member. The hollowing waveguide tube includes a hollow dielectric layer formed in a tubular shape. The foamed resin member is provided over a predetermined length in a longitudinal direction of the hollow waveguide tube and covers a surface of the dielectric layer to surround an outer periphery of the hollow waveguide tube.Type: GrantFiled: October 18, 2017Date of Patent: May 25, 2021Assignee: PIONEER CORPORATIONInventors: Yasuo Hosoda, Tomoyuki Miyamoto, Katsunori Obata, Takahiro Togashi, Takao Tagiri
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Publication number: 20190296416Abstract: An electromagnetic wave transmission cable for transmitting an electromagnetic wave comprises a hollow waveguide tube and a foamed resin member. The hollowing waveguide tube includes a hollow dielectric layer formed in a tubular shape. The foamed resin member is provided over a predetermined length in a longitudinal direction of the hollow waveguide tube and covers a surface of the dielectric layer to surround an outer periphery of the hollow waveguide tube.Type: ApplicationFiled: October 18, 2017Publication date: September 26, 2019Inventors: Yasuo HOSODA, Tomoyuki MIYAMOTO, Katsunori OBATA, Takahiro TOGASHI, Takao TAGIRI
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Patent number: 8879371Abstract: A recording medium is provided with: a guide layer on which a guide track or tracks are formed; and a plurality of recording layers, wherein a same mark group is formed in a same rotational phase position of each of a plurality of guide tracks which are included in a beam spot of guide laser light, the mark group including a pair of record marks which are shifted by a predetermined distance toward a right side and a left side, respectively, from a track center.Type: GrantFiled: January 22, 2013Date of Patent: November 4, 2014Assignees: Pioneer Corporation, Memory-Tech Holdings Inc.Inventors: Masayoshi Yoshida, Takuya Shiroto, Hideki Kobayashi, Masakazu Ogasawara, Takao Tagiri, Makoto Suzuki
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Patent number: 8792319Abstract: A recording medium is provided with: a guide layer on which a guide track or guide tracks are formed; and recording layers, wherein (i) an information mark group and (ii) a distinctive mark group are formed in the guide layer, the information mark group being formed on each of a plurality of guide tracks, the distinctive mark group distinguishing a center track out of the plurality of guide tracks on each of which the information mark group is formed, the distinctive mark group including a pair of distinctive record marks which are shifted toward a right side and a left side, respectively, from a track center of the center track, a width of each distinctive record mark is twice or more a width of the guide track.Type: GrantFiled: May 29, 2013Date of Patent: July 29, 2014Assignees: Pioneer Corporation, Memory-Tech Holdings Inc., Pioneer Digital Design and Manufacturing CorporationInventors: Takuya Shiroto, Masayoshi Yoshida, Hideki Kobayashi, Masakazu Ogasawara, Takao Tagiri, Makoto Suzuki
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Publication number: 20130337216Abstract: In an optical disc including a discoid optical-disc substrate and a coating film formed on the optical-disc substrate, the optical-disc substrate includes a first region including the innermost periphery thereof and having a projection formed on the whole of the first region, and a second region located outside of the first region. The coating layer is formed on the second region. Before the coating film is formed, the thickness of the optical-disc substrate at the first region is greater than the thickness of the optical-disc substrate at the second region. After the coating film is formed, the total thickness of the optical-disc substrate at the second region and the coating film is greater than the thickness of the optical-disc substrate at the first region.Type: ApplicationFiled: January 27, 2011Publication date: December 19, 2013Applicant: Pioneer CorporationInventors: Yasunobu Higashika, Takao Tagiri
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Publication number: 20130322227Abstract: A recording medium is provided with: a guide layer on which a guide track or guide tracks are formed; and recording layers, wherein (i) an information mark group and (ii) a distinctive mark group are formed in the guide layer, the information mark group being formed on each of a plurality of guide tracks, the distinctive mark group distinguishing a center track out of the plurality of guide tracks on each of which the information mark group is formed, the distinctive mark group including a pair of distinctive record marks which are shifted toward a right side and a left side, respectively, from a track center of the center track, a width of each distinctive record mark is twice or more a width of the guide track.Type: ApplicationFiled: May 29, 2013Publication date: December 5, 2013Applicants: Pioneer Corporation, Pioneer Digital Design and Manufacturing Corporation, Memory-Tech Holding Inc.Inventors: Takuya SHIROTO, Masayoshi YOSHIDA, Hideki KOBAYASHI, Masakazu OGASAWARA, Takao TAGIRI, Makoto SUZUKI
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Patent number: 7848215Abstract: An optical-recording medium is provided with at least a first recording layer for recording information optically; and a second recording layer for recording information optically by a light beam that passes through said first recording layer; wherein the track pitch of a recording track that is formed on said second recording layer is narrower than the track pitch of a recording track that is formed on said first recording layer.Type: GrantFiled: March 24, 2006Date of Patent: December 7, 2010Assignee: Pioneer CorporationInventors: Seiro Oshima, Masataka Yamaguchi, Toshihiko Takishita, Takao Tagiri
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Patent number: 7548499Abstract: An offset amount measuring method is provided with: a recording process for measurement (i) of recording information for measurement, into a recording track in the L0 layer, by a predetermined section, from a measurement reference position, and of (ii) recording the information for measurement, into a recording track in the L1 layer, by the predetermined section, from or toward a measurement correspondence position, which is associated with the measurement reference position by the pre-format address; a first detecting process of detecting a border of a first recorded area in which the information for measurement is recorded and a first unrecorded area in the first recording track, on the basis of a difference in reflectance between the first recorded area and the first unrecorded area; a second detecting process of detecting a second border position in the recording track in the L1 layer, on the basis of a difference in reflectance; and a determining process of determining the offset amount, on the basis ofType: GrantFiled: December 13, 2005Date of Patent: June 16, 2009Assignee: Pioneer CorporationInventors: Takao Tagiri, Seiro Oshima
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Patent number: 7260052Abstract: A groove track and a land track are alternately and spirally formed on an information recording medium. On the land track neighboring the groove track, pre-information indicating position information of a track on a disc is formed as a prepit. On the information recording medium, an embossed area is formed so that information about a copyright and for preventing an illegal copy cannot be rewritten. In the embossed area, an embossed configuration including a pit and a space of predetermined depths is formed. The prepit in the embossed area is formed so that the prepit has an optimized configuration according to a pit length and a space length in the embossed area which the prepit neighbors. Consequently, interference between the embossed configuration and the prepit can be prevented even in a case that the prepit is formed in addition to the embossed configuration in the embossed area.Type: GrantFiled: November 5, 2003Date of Patent: August 21, 2007Assignee: Pioneer CorporationInventors: Masahiro Kato, Tatsuhiro Yone, Atsushi Yamaguchi, Eiji Muramatsu, Shoji Taniguchi, Toshihiko Takishita, Seiro Oshima, Takao Tagiri
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Publication number: 20060256703Abstract: An optical-recording medium is provided with at least a first recording layer for recording information optically; and a second recording layer for recording information optically by a light beam that passes through said first recording layer; wherein the track pitch of a recording track that is formed on said second recording layer is narrower than the track pitch of a recording track that is formed on said first recording layer.Type: ApplicationFiled: March 24, 2006Publication date: November 16, 2006Inventors: Seiro Oshima, Masataka Yamaguchi, Toshihiko Takishita, Takao Tagiri
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Patent number: 7092351Abstract: The present invention provides an optical recording medium, in which levels of wobble signals extracted from a recording area formed snakily, a reproduction exclusive area and an impossible area are maintained constant. On DVD-RW, groove tracks are snakily formed on a groove section on which recording information is recorded, and pit strings where a plurality of phase pits wave are arranged on the impossible area and the reproduction exclusive area which prevent illegal copying. On the respective areas, pit depths (groove depths), duty of the pit strings and wobbling amplitudes are set according to predetermined conditions so that the output levels of the wobble signals extracted based on the wobbling amplitudes can be maintained constant on the respective areas. As a result, synchronous control can be made accurately at the time of recording and reproduction on/from the DVD-RW.Type: GrantFiled: December 10, 2003Date of Patent: August 15, 2006Assignee: Pioneer CorporationInventors: Atsushi Yamaguchi, Masahiro Kato, Eiji Muramatsu, Seiro Oshima, Takao Tagiri
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Publication number: 20060133244Abstract: An offset amount measuring method is provided with: a recording process for measurement (i) of recording information for measurement, into a recording track in the L0 layer, by a predetermined section, from a measurement reference position, and of (ii) recording the information for measurement, into a recording track in the L1 layer, by the predetermined section, from or toward a measurement correspondence position, which is associated with the measurement reference position by the pre-format address; a first detecting process of detecting a border of a first recorded area in which the information for measurement is recorded and a first unrecorded area in the first recording track, on the basis of a difference in reflectance between the first recorded area and the first unrecorded area; a second detecting process of detecting a second border position in the recording track in the L1 layer, on the basis of a difference in reflectance; and a determining process of determining the offset amount, on the basis ofType: ApplicationFiled: December 13, 2005Publication date: June 22, 2006Applicant: PIONEER CORPORATIONInventors: Takao Tagiri, Seiro Oshima
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Publication number: 20050213480Abstract: An optical disk with multi-layered structure provided with at least two recording layers is provided. In respective recording layers, tracks are formed, and the track is formed such that the amount of eccentricity is different in respective recording layers. In the method for identifying the recording layer which identifies the recording layer of the optical disk, the recording layer is identified by detecting the amount of the eccentricity set to the track of the respective recording layers.Type: ApplicationFiled: March 22, 2005Publication date: September 29, 2005Inventors: Nobuki Yamaoka, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo, Masataka Yamaguchi, Takao Tagiri
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Publication number: 20050068883Abstract: An optical recording medium having a structure comprising at least a first substrate, a first recording layer capable of optical recording, a first reflection layer, an intermediate layer, a second recording layer capable of optical recording, a second reflection layer and a second substrate in this order from a side on which recording, reproducing or recording and reproducing laser light is applied, wherein the intermediate layer is composed of a resin having a glass transition temperature of 90° C. or greater.Type: ApplicationFiled: September 24, 2004Publication date: March 31, 2005Inventors: Atsushi Kondo, Toshihiko Takishita, Seiro Oshima, Takao Tagiri
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Patent number: 6837072Abstract: A rewritable optical recording medium includes a segmented groove area in which the groove track is segmented along a rotating direction of the recording medium by groove non-forming portions to form a plurality of groove portions; and a continuous groove area in which a continuous groove is formed, the continuous groove having a groove width smaller than a groove width in the segmented groove area.Type: GrantFiled: June 2, 2003Date of Patent: January 4, 2005Assignee: Pioneer CorporationInventors: Yoshio Sasaki, Toshihiko Maruyama, Eiji Muramatsu, Masahiro Kato, Seiro Oshima, Takao Tagiri
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Patent number: 6813237Abstract: The present invention provides an optical recording medium, in which levels of wobble signals extracted from a recording area formed snakily, a reproduction exclusive area and an impossible area are maintained constant. On DVD-RW, groove tracks are snakily formed on a groove section on which recording information is recorded, and pit strings where a plurality of phase pits wave are arranged on the impossible area and the reproduction exclusive area which prevent illegal copying. On the respective areas, pit depths (groove depths), duty of the pit strings and wobbling amplitudes are set according to predetermined conditions so that the output levels of the wobble signals extracted based on the wobbling amplitudes can be maintained constant on the respective areas. As a result, synchronous control can be made accurately at the time of recording and reproduction on/from the DVD-RW.Type: GrantFiled: July 25, 2001Date of Patent: November 2, 2004Assignee: Pioneer CorporationInventors: Atsushi Yamaguchi, Masahiro Kato, Eiji Muramatsu, Seiro Oshima, Takao Tagiri
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Publication number: 20040141454Abstract: A groove track and a land track are alternately and spirally formed on an information recording medium. On the land track neighboring the groove track, pre-information indicating position information of a track on a disc is formed as a prepit. On the information recording medium, an embossed area is formed so that information about a copyright and for preventing an illegal copy cannot be rewritten. In the embossed area, an embossed configuration including a pit and a space of predetermined depths is formed. The prepit in the embossed area is formed so that the prepit has an optimized configuration according to a pit length and a space length in the embossed area which the prepit neighbors. Consequently, interference between the embossed configuration and the prepit can be prevented even in a case that the prepit is formed in addition to the embossed configuration in the embossed area.Type: ApplicationFiled: November 5, 2003Publication date: July 22, 2004Applicant: PIONEER CORPORATIONInventors: Masahiro Kato, Tatsuhiro Yone, Atsushi Yamaguchi, Eiji Muramatsu, Shoji Taniguchi, Toshihiko Takishita, Seiro Oshima, Takao Tagiri
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Publication number: 20040114493Abstract: The present invention provides an optical recording medium, in which levels of wobble signals extracted from a recording area formed snakily, a reproduction exclusive area and an impossible area are maintained constant. On DVD-RW, groove tracks are snakily formed on a groove section on which recording information is recorded, and pit strings where a plurality of phase pits wave are arranged on the impossible area and the reproduction exclusive area which prevent illegal copying. On the respective areas, pit depths (groove depths), duty of the pit strings and wobbling amplitudes are set according to predetermined conditions so that the output levels of the wobble signals extracted based on the wobbling amplitudes can be maintained constant on the respective areas. As a result, synchronous control can be made accurately at the time of recording and reproduction on/from the DVD-RW.Type: ApplicationFiled: December 10, 2003Publication date: June 17, 2004Applicant: PIONEER CORPORATIONInventors: Atsushi Yamaguchi, Masahiro Kato, Eiji Muramatsu, Seiro Oshima, Takao Tagiri
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Publication number: 20040062189Abstract: A phase change type information storage medium is provided, which achieves high-speed recording/reproduction. A DVD-RW disc having a substrate formed with grooves, lands, and land pre-pits, on which are laminated a first dielectric layer, a phase-change recording layer, a second dielectric layer, a reflective layer, and an overcoat layer. The disc is rotated at a 3.49-7.0 m/sec linear speed while being irradiated with a laser beam of 600-700 nm wavelength focused by an objective lens of 0.55-0.7 numerical aperture to the phase-change recording layer from the substrate side. The phase-change recording layer is made of a Ge-In-Sb-Te material, and the reflective layer is made of an Ag-Nd-Cu material. The first dielectric layer has a 65-85 nm thickness, the phase-change recording layer has a 10-20 nm thickness, the second dielectric layer has a 13-23 nm thickness, and the reflective layer has a 100-225 nm thickness.Type: ApplicationFiled: August 1, 2003Publication date: April 1, 2004Applicant: Pioneer CorporationInventors: Makoto Matsukawa, Seiro Oshima, Takao Tagiri, Kiyoshi Nagasawa, Toshihiko Takishita
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Patent number: 6687214Abstract: A recording medium includes pairs of groove tracks and land tracks having periodically formed bent portion provided side by side on a substrate, a plurality of land prepits previously formed on the land tracks and carrying information about the groove tracks, and a recording layer formed on at least the groove tracks and the land tracks. The land prepits have a radius of mean curvature smaller than a radius of mean curvature of sides of the groove tracks in land-prepit absent regions of the land prepits and are defined by curved surfaces continuously extending from the sides of the groove tracks. Those sides of the groove tracks which face the continuous curved surfaces of the land prepits are curved surfaces that stricture the groove tracks. The depth of the land prepit is larger than that of the groove track.Type: GrantFiled: August 8, 2001Date of Patent: February 3, 2004Assignee: Pioneer CorporationInventors: Masahiro Kato, Eiji Muramatsu, Atsushi Yamaguchi, Shoji Taniguchi, Seiro Oshima, Makoto Matsukawa, Takao Tagiri, Kazuhiro Yamato, Tatsuhiro Yone