Patents by Inventor Keiko Watanabe
Keiko 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).
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Patent number: 8094412Abstract: Embodiments of the present invention relate disk drives, and in particular to realizing a positioning accuracy equal to that of an actuator having the mountable maximum number of suspensions, in an actuator having the smaller number of suspensions than the mountable maximum number. An embodiment of a magnetic disk device includes an actuator having an arm to which a suspension for applying a predetermined load onto a slider with a magnetic head is attached, and an arm to which a plate is attached instead of having the suspension. The plate attached to the arm in place of the suspension has a partially small section with respect to a section perpendicular to an arm longitudinal direction (constricted part), and the constricted part is located between a plate leading end and an arm attachment part.Type: GrantFiled: November 18, 2008Date of Patent: January 10, 2012Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Noritaka Otake, Keiko Watanabe, Toshihiko Shimizu, Kenji Tomida
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Patent number: 8064603Abstract: When content owned by a source device are played back in a rendering device, a content key is transferred from the source device to the rendering device via a secure session every time playback is carried out. Then, encoded content are decoded and played back to be outputted by using the transferred content key so as to discard the content key after the end of playback.Type: GrantFiled: August 2, 2006Date of Patent: November 22, 2011Assignee: Kabushiki Kaisha TOSHIBAInventors: Jun Sato, Keiko Watanabe, Toru Terauchi
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Patent number: 8064171Abstract: Embodiments of the present invention help to reduce out-of-plane excitation force exerted on a coil in a voice coil motor of a magnetic disk drive, so that vibration of a magnetic head is suppressed. According to one embodiment, a voice coil motor has a flat magnet that faces a coil, and generates a magnetic field, and yokes that apply the magnetic field generated by the magnet to the coil. The magnet is provided with a magnetic flux guiding section, absorbing leakage flux from the magnet, on a most distal end of the magnet as viewed from a pivot axis. A most distal part of the coil as viewed from the pivot axis, may be situated in an outer side with respect to the most distal end of the magnet, and the magnetic flux guiding section is provided between the most distal end of the magnet and the most distal part of the coil.Type: GrantFiled: January 16, 2009Date of Patent: November 22, 2011Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Toshihiko Shimizu, Keiko Watanabe, Shigeo Nakamura, Noritaka Otake
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Patent number: 7984296Abstract: According to one embodiment, a content protection device includes a writing module configured to write protection information into file management information item in order to protect a content which is specified to be protected, wherein the writing module is configured to write the protection information corresponding to sectors which stores content key management information file includes content key link information item includes content key position information item of encrypted content key corresponding to content which is specified to be protected, or to write protection information corresponding to at least part of a sectors which stores content key management file includes encrypted content key corresponding to content which is specified to be protected.Type: GrantFiled: March 31, 2010Date of Patent: July 19, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Keiko Watanabe, Jun Sato
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Publication number: 20100333103Abstract: According to one embodiment, an information processor includes a management module that manages a plurality of register areas in a host controller for processing data protected by copyright. The register areas store confidential information for copyright protection. The management module includes a use state management module and a release module. The use state management module manages use state information on whether the register areas are used by existing process tasks. When all the register areas are occupied by the existing process tasks and a new process task requests for the use of a register area to perform a process based on the confidential information, the release module releases a register area occupied by one of the existing process tasks according to the use state information to assign the register area to the new process task.Type: ApplicationFiled: June 7, 2010Publication date: December 30, 2010Inventors: Naomiki Kobayashi, Hiroki Iwahara, Jun Sato, Keisuke Yasui, Fumio Yoshiya, Keiko Watanabe, Jun Ohashi
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Publication number: 20100250934Abstract: According to one embodiment, a content protection device includes a writing module configured to write protection information into file management information item in order to protect a content which is specified to be protected, wherein the writing module is configured to write the protection information corresponding to sectors which stores content key management information file includes content key link information item includes content key position information item of encrypted content key corresponding to content which is specified to be protected, or to write protection information corresponding to at least part of a sectors which stores content key management file includes encrypted content key corresponding to content which is specified to be protected.Type: ApplicationFiled: March 31, 2010Publication date: September 30, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Keiko Watanabe, Jun Sato
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Patent number: 7685071Abstract: A mobile communication terminal moves and backs up a content, which was downloaded from a content server, to a personal computer. When the mobile communication terminal receives an encryption key generation request from the personal computer via a cable, the mobile communication terminal extracts information to be used for generating the encryption key and generates the encryption key by using the extracted information and own telephone number. And the generated encryption key is transmitted to the personal computer via the cable. Accordingly, the backed up and moved content can be reproduced with the personal computer.Type: GrantFiled: April 18, 2006Date of Patent: March 23, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Toru Terauchi, Jun Sato, Keiko Watanabe
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Publication number: 20100042840Abstract: According to an aspect of the invention, there is provided a content sharing system including a first device configured to acquire a right object; a second device configured to acquire a content of the right object from the first device; a session key generation unit provided in the first device and the second device and configured to generate a session key based on mutual authentication; a temporary right object generation unit provided in the first device and configured to generate a temporary right object from the right object by using the session key to supply the generated temporary right to the second device; and a content play unit provided in the second device and configured to receive the temporary right object to play the content of the right object acquired from the first device by using the temporary right object.Type: ApplicationFiled: October 22, 2009Publication date: February 18, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Keiko WATANABE, Jun Sato, Toru Terauchi
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Patent number: 7630940Abstract: According to an aspect of the invention, there is provided a content sharing system including: a first device configured to acquire a right object; a second device configured to acquire a content of the right object from the first device; a session key generation unit provided in the first device and the second device and configured to generate a session key based on mutual authentication; a temporary right object generation unit provided in the first device and configured to generate a temporary right object from the right object by using the session key to supply the generated temporary right to the second device; and a content play unit provided in the second device and configured to receive the temporary right object to play the content of the right object acquired from the first device by using the temporary right object.Type: GrantFiled: November 30, 2006Date of Patent: December 8, 2009Assignee: Kabushiki Kaisha TOSHIBAInventors: Keiko Watanabe, Jun Sato, Toru Terauchi
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Patent number: 7595163Abstract: This invention provides: a method for detecting SARS pathogenic viruses with high sensitivity and rapidity for diagnosing severe acute respiratory syndrome (SARS); an oligonucleotide primer that can specifically hybridize with any nucleotide sequence constructed based on the nucleotide sequence of RNA polymerase of the SARS coronavirus; a method for nucleic acid amplification using such primer; a method for diagnosing infection with the SARS coronavirus via detection of nucleic acid amplification; and a kit for diagnosing SARS.Type: GrantFiled: June 10, 2008Date of Patent: September 29, 2009Assignee: Eiken Kagaku Kabushiki KaishaInventors: Harumi Minekawa, Keiko Watanabe, Shinichi Kojiya
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Patent number: 7595381Abstract: This invention provides: a method for detecting SARS pathogenic viruses with high sensitivity and rapidity for diagnosing severe acute respiratory syndrome (SARS); an oligonucleotide primer that can specifically hybridize with any nucleotide sequence constructed based on the nucleotide sequence of RNA polymerase of the SARS coronavirus; a method for nucleic acid amplification using such primer; a method for diagnosing infection with the SARS coronavirus via detection of nucleic acid amplification; and a kit for diagnosing SARS.Type: GrantFiled: June 10, 2008Date of Patent: September 29, 2009Assignee: Eiken Kagaku Kabushiki KaishaInventors: Harumi Minekawa, Keiko Watanabe, Shinichi Kojiya
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Publication number: 20090208003Abstract: According to one embodiment, a host computer updates the media key block MKB in a first updatable memory device in the case where the version number of the media key block MKB read from a recording medium is newer than that of the media key block MKB in the first updatable memory device. The host computer generates a medium unique key Kmu based on a media key Km calculated from the media key block MKB read from the recording medium and a media ID read from the recording medium. The host computer executes the authentication and key exchange AKE process with the recording medium based on the medium unique key Kmu.Type: ApplicationFiled: February 10, 2009Publication date: August 20, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shinichi Matsukawa, Jun Sato, Keiko Watanabe
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Publication number: 20090147406Abstract: Embodiments of the present invention relate disk drives, and in particular to realizing a positioning accuracy equal to that of an actuator having the mountable maximum number of suspensions, in an actuator having the smaller number of suspensions than the mountable maximum number. An embodiment of a magnetic disk device includes an actuator having an arm to which a suspension for applying a predetermined load onto a slider with a magnetic head is attached, and an arm to which a plate is attached instead of having the suspension. The plate attached to the arm in place of the suspension has a partially small section with respect to a section perpendicular to an arm longitudinal direction (constricted part), and the constricted part is located between a plate leading end and an arm attachment part.Type: ApplicationFiled: November 18, 2008Publication date: June 11, 2009Inventors: Noritaka Otake, Keiko Watanabe, Toshihiko Shimizu, Kenji Tomida
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Publication number: 20090117537Abstract: This invention provides: a method for detecting SARS pathogenic viruses with high sensitivity and rapidity for diagnosing severe acute respiratory syndrome (SARS); an oligonucleotide primer that can specifically hybridize with any nucleotide sequence constructed based on the nucleotide sequence of RNA polymerase of the SARS coronavirus; a method for nucleic acid amplification using such primer; a method for diagnosing infection with the SARS coronavirus via detection of nucleic acid amplification; and a kit for diagnosing SARS.Type: ApplicationFiled: June 10, 2008Publication date: May 7, 2009Applicant: EIKEN KAGAKU KABUSHIKI KAISHAInventors: Harumi MINEKAWA, Keiko Watanabe, Shinichi Kojiya
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Publication number: 20090092962Abstract: This invention provides: a method for detecting SARS pathogenic viruses with high sensitivity and rapidity for diagnosing severe acute respiratory syndrome (SARS); an oligonucleotide primer that can specifically hybridize with any nucleotide sequence constructed based on the nucleotide sequence of RNA polymerase of the SARS coronavirus; a method for nucleic acid amplification using such primer; a method for diagnosing infection with the SARS coronavirus via detection of nucleic acid amplification; and a kit for diagnosing SARS.Type: ApplicationFiled: June 10, 2008Publication date: April 9, 2009Applicant: EIKEN KAGAKU KABUSHIKI KAISHAInventors: Harumi Minekawa, Keiko Watanabe, Shinichi Kojiya
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Patent number: 7505955Abstract: An information terminal according to this invention includes a storage means having a first storage area which is accessible from an external terminal, and a second storage area which is inaccessible from the external terminal. Content which includes a content body and rights information indicating a use condition given to the content body is acquired. The acquired content is encrypted and the encrypted content is stored in the first storage area. In addition, state management information used to manage the variable state of the use condition given to the content body is generated on the basis of the rights information included in the acquired content, and the generated state management information is stored in the second storage area.Type: GrantFiled: March 24, 2005Date of Patent: March 17, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Keiko Watanabe, Jun Sato, Toru Terauchi
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Patent number: 7460341Abstract: Embodiments of the invention suppress head jump at the time of application of an impact to provide for an excellent impact resistance performance in a magnetic disk device. In one embodiment, an actuator of a magnetic disk device comprises a suspension mounting the slider on a tip end side thereof to give a predetermined load to the slider, and an arm that holds the suspension, the arm being supported to be able to turn. The arm comprises two arm portions juxtaposed in a direction perpendicular to a surface of the disk, and a spacing between the two arm portions on a side of supported portions thereof in the direction perpendicular to the surface of the disk is larger than that on a side of the slider in the direction perpendicular to the surface of the disk.Type: GrantFiled: August 5, 2005Date of Patent: December 2, 2008Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Toshihiko Shimizu, Haruhide Takahashi, Kousaku Wakatsuki, Keiko Watanabe
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Patent number: 7401065Abstract: A download control program of a client terminal transmits a request to a download server, which stores Download Descriptors that include attribution information of contents, for a Download Descriptor, and receives the Download Descriptor from the download server. The download server, before transmitting the Download Descriptor to the client terminal, adds information indicating that there is a difference between a Download Descriptor contained in the request from the client terminal and the Download Descriptor stored in data memory of the download server if the download server detects the difference between them. The client terminal transmits a content download request to a contents server based on the received Download Descriptor.Type: GrantFiled: August 4, 2005Date of Patent: July 15, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Keiko Watanabe, Jun Sato, Toru Terauchi
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Patent number: 7399588Abstract: This invention provides: a method for detecting SARS pathogenic viruses with high sensitivity and rapidity for diagnosing severe acute respiratory syndrome (SARS); an oligonucleotide primer that can specifically hybridize with any nucleotide sequence constructed based on the nucleotide sequence of RNA polymerase of the SARS coronavirus; a method for nucleic acid amplification using such primer; a method for diagnosing infection with the SARS coronavirus via detection of nucleic acid amplification; and a kit for diagnosing SARS.Type: GrantFiled: June 15, 2004Date of Patent: July 15, 2008Assignee: Eiken Kagaku Kabushiki KaishaInventors: Harumi Minekawa, Keiko Watanabe, Shinichi Kojiya
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Publication number: 20080112299Abstract: Embodiments of present invention help to realize a highly reliable magnetic disk drive by preventing a positional displacement between a magnetic head and a target track by decreasing restricting forces that a cover exerts on a base when the temperature is increased. According to one embodiment, a base is formed by aluminum die casting, has a concave, rectangular parallelepiped shape, and is formed with step portions at the four corners. A cover is a flat plate of stainless steel or iron. Four corner portions of the cover are bent to form step portions. The cover is fixed to the base at the four corners with bolts at two side positions (six positions in total). A gasket is inserted at that time to enhance the sealing performance.Type: ApplicationFiled: November 13, 2007Publication date: May 15, 2008Applicant: Hitachi Global Storage Technologies Inc.Inventors: Toshihiko Shimizu, Keiko Watanabe