Patents by Inventor Satoshi Yamakawa
Satoshi Yamakawa 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: 8972358Abstract: A file storage apparatus comprises: duplication determination unit that determines whether file supplied from client apparatus and file stored in storage unit coincide with each other in same format, and stores the file supplied from client apparatus in the storage unit if the files do not coincide in the same format; and storage management unit that associates, if duplication determination unit determines that the files coincide in the same format, format of the file supplied from the client apparatus with the file stored in the storage unit, reads file stored in the storage unit in response to file read request from client apparatus, converts, if format associated with the read file exists, the read file into the format, and provides the converted file.Type: GrantFiled: June 9, 2011Date of Patent: March 3, 2015Assignee: NEC CorporationInventor: Satoshi Yamakawa
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Patent number: 8779855Abstract: In order to realize a wider bandwidth of a frequency characteristic of a power amplification circuit, outputs of differential push-pull amplifiers which are matched at respectively different frequencies are combined together by secondary inductors, and the combined signal is outputted.Type: GrantFiled: May 29, 2013Date of Patent: July 15, 2014Assignee: Renesas Electronics CorporationInventors: Tetsuya Iida, Akihiko Furukawa, Satoshi Yamakawa, Tsuyoshi Kawakami, Masao Kondo, Yutaka Hoshino
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Publication number: 20130265109Abstract: In order to realize a wider bandwidth of a frequency characteristic of a power amplification circuit, outputs of differential push-pull amplifiers which are matched at respectively different frequencies are combined together by secondary inductors, and the combined signal is outputted.Type: ApplicationFiled: May 29, 2013Publication date: October 10, 2013Inventors: Tetsuya IIDA, Akihiko FURUKAWA, Satoshi YAMAKAWA, Tsuyoshi KAWAKAMI, Masao KONDO, Yutaka HOSHINO
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Publication number: 20130218851Abstract: A storage system is characterized in that the storage system includes duplication-determination-unit determining means for determining a duplication determination unit, which is a unit to be used in determining duplications of data, on the basis of a duplication generation rate computed for each of a plurality of data division units obtained as a result of division of data stored in a storage device, and duplication eliminating means for carrying out processing to eliminate duplications of the data stored in the storage device on the basis of the duplication determination unit determined by the duplication-determination-unit determining means.Type: ApplicationFiled: October 3, 2011Publication date: August 22, 2013Applicant: NEC CORPORATIONInventor: Satoshi Yamakawa
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Patent number: 8493152Abstract: A power amplifier comprises a plurality of primary inductors provided on a substrate in a circular geometry as a whole; a plurality of amplifier pairs; a secondary inductor; and a connection wiring. Each amplifier pair is coupled to two ends of a corresponding primary inductor, and amplifies and output to the corresponding primary inductor a pair of first and second signals given as differential input signals, respectively. The secondary inductor is provided adjacent to the primary inductors in a circular geometry, further combines and outputs signals made by combining first and second signals in each primary inductor. The connection wiring is provided inside the primary inductors on the substrate and electrically couples middle points of respective primary inductors with each other.Type: GrantFiled: September 15, 2012Date of Patent: July 23, 2013Assignee: Renesas Electronics CorporationInventors: Tsuyoshi Kawakami, Akihiko Furukawa, Satoshi Yamakawa
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Patent number: 8461927Abstract: In order to realize a wider bandwidth of a frequency characteristic of a power amplification circuit, outputs of differential push-pull amplifiers which are matched at respectively different frequencies are combined together by secondary inductors, and the combined signal is outputted.Type: GrantFiled: November 13, 2012Date of Patent: June 11, 2013Assignee: Renesas Electronics CorporationInventors: Tsuyoshi Kawakami, Akihiko Furukawa, Satoshi Yamakawa, Tetsuya Iida, Masao Kondo, Yutaka Hoshino
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Publication number: 20130080403Abstract: A file storage apparatus comprises: duplication determination unit that determines whether file supplied from client apparatus and file stored in storage unit coincide with each other in same format, and stores the file supplied from client apparatus in the storage unit if the files do not coincide in the same format; and storage management unit that associates, if duplication determination unit determines that the files coincide in the same format, format of the file supplied from the client apparatus with the file stored in the storage unit, reads file stored in the storage unit in response to file read request from client apparatus, converts, if format associated with the read file exists, the read file into the format, and provides the converted file.Type: ApplicationFiled: June 9, 2011Publication date: March 28, 2013Applicant: NEC CORPORATIONInventor: Satoshi Yamakawa
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Publication number: 20130013570Abstract: An extraction unit extracts, in accordance with a format of a file which the client apparatus requests a file storage apparatus to store to storing means, data possibly made into independent data as an independent file from the file which is data in a portion that can be stored to the storing means. A duplicate determination unit determines whether the storing means stores data matching the data possibly made into independent data that is extracted by the extraction unit or remaining data which are data obtained by deleting the data possibly made into independent data from the file. A storing processing unit stores, to the storing means, the data possibly made into independent data or the remaining data which do not match data stored to the storing means, on the basis of the determination result made by the duplicate determination unit.Type: ApplicationFiled: March 11, 2011Publication date: January 10, 2013Applicant: NEC CORPORATIONInventor: Satoshi Yamakawa
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Publication number: 20130009709Abstract: A power amplifier comprises a plurality of primary inductors provided on a substrate in a circular geometry as a whole; a plurality of amplifier pairs; a secondary inductor; and a connection wiring. Each amplifier pair is coupled to two ends of a corresponding primary inductor, and amplifies and output to the corresponding primary inductor a pair of first and second signals given as differential input signals, respectively. The secondary inductor is provided adjacent to the primary inductors in a circular geometry, further combines and outputs signals made by combining first and second signals in each primary inductor. The connection wiring is provided inside the primary inductors on the substrate and electrically couples middle points of respective primary inductors with each other.Type: ApplicationFiled: September 15, 2012Publication date: January 10, 2013Inventors: Tsuyoshi KAWAKAMI, Akihiko FURUKAWA, Satoshi YAMAKAWA
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Patent number: 8346826Abstract: A system which includes at least one client, a plurality of file servers, each having a file system, and a switch logically arranged between the client and the plurality of file servers to provide file access services which virtually render the plurality of file systems accessible as a single file system, termed a ‘pseudo file system’, when viewed from the terminal. The switch distributes a command that starts generation of snapshots to the plurality of file servers, which file servers formulate respective snapshots responsive to the command that starts formation of the snapshots. The switch sets the plurality of snapshots, generated by the plurality of file servers, so as to be associated with the file system structure of the virtual file system at the time of formation of the snapshots.Type: GrantFiled: September 28, 2005Date of Patent: January 1, 2013Assignee: NEC CorporationInventors: Takashi Torii, Satoshi Yamakawa, Yoshihiro Kajiki
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Patent number: 8330544Abstract: In order to realize a wider bandwidth of a frequency characteristic of a power amplification circuit, outputs of differential push-pull amplifiers which are matched at respectively different frequencies are combined together by secondary inductors, and the combined signal is outputted.Type: GrantFiled: February 6, 2012Date of Patent: December 11, 2012Assignee: Renesas Electronics CorporationInventors: Tsuyoshi Kawakami, Akihiko Furukawa, Satoshi Yamakawa, Tetsuya Iida, Masao Kondo, Yutaka Hoshino
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Patent number: 8314658Abstract: A power amplifier comprises a plurality of primary inductors provided on a substrate in a circular geometry as a whole; a plurality of amplifier pairs; a secondary inductor; and a connection wiring. Each amplifier pair is coupled to two ends of a corresponding primary inductor, and amplifies and output to the corresponding primary inductor a pair of first and second signals given as differential input signals, respectively. The secondary inductor is provided adjacent to the primary inductors in a circular geometry, further combines and outputs signals made by combining first and second signals in each primary inductor. The connection wiring is provided inside the primary inductors on the substrate and electrically couples middle points of respective primary inductors with each other.Type: GrantFiled: September 15, 2010Date of Patent: November 20, 2012Assignee: Renesas Electronics CorporationInventors: Tsuyoshi Kawakami, Akihiko Furukawa, Satoshi Yamakawa
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Patent number: 8301603Abstract: Disclosed is a system in which an index registration unit registers an index, which will be used for search processing, as a partitioned index which is partitioned on a time series basis, and a search means reads indexes older than a specified point in time, which is used as a search base point, to perform search processing, thereby searching for information based on a point in time in the past.Type: GrantFiled: October 2, 2007Date of Patent: October 30, 2012Assignee: NEC CorporationInventors: Masaki Kan, Yoshihiro Kajiki, Satoshi Yamakawa, Takashi Torii, Yuji Kaneko
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Patent number: 8224772Abstract: Disclosed is a data management apparatus comprising a message transfer/analysis unit that receives an object data access request from a client and returns a response; an object metadata storage unit that stores, as metadata, a set of ancillary information on data for an object and a data area corresponding to the ancillary information; an object metadata management unit that performs reading, updating, and registration processing for the metadata; a data conversion unit that sends the data access request to a data access unit, extracts object data; and a data access unit that sends a data access command, specified by the data conversion unit, to a file server or a database server and sends response data, received from the file server or the database server, to the data conversion unit.Type: GrantFiled: November 30, 2007Date of Patent: July 17, 2012Assignee: NEC CorporationInventors: Satoshi Yamakawa, Yoshihiro Kajiki
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Publication number: 20120133431Abstract: In order to realize a wider bandwidth of a frequency characteristic of a power amplification circuit, outputs of differential push-pull amplifiers which are matched at respectively different frequencies are combined together by secondary inductors, and the combined signal is outputted.Type: ApplicationFiled: February 6, 2012Publication date: May 31, 2012Applicant: Renesas Electronics CorporationInventors: Tsuyoshi KAWAKAMI, Akihiko FURUKAWA, Satoshi YAMAKAWA, Tetsuya IIDA, Masao KONDO, Yutaka HOSHINO
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Patent number: 8134408Abstract: In order to realize a wider bandwidth of a frequency characteristic of a power amplification circuit, outputs of differential push-pull amplifiers which are matched at respectively different frequencies are combined together by secondary inductors, and the combined signal is outputted.Type: GrantFiled: November 12, 2009Date of Patent: March 13, 2012Assignee: Renesas Electronics CorporationInventors: Tsuyoshi Kawakami, Akihiko Furukawa, Satoshi Yamakawa, Tetsuya Iida, Masao Kondo, Yutaka Hoshino
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Patent number: 8093950Abstract: A power amplifier amplifying and compositing differential signals and capable of suppressing harmonics is provided. The power amplifier includes first amplifiers amplifying a first input signal and a second input signal, which are differential signals, a first coil receiving the first input signal and the second input signal amplified by the first amplifiers, a second coil magnetically coupled with the first coil and outputting a composite signal of the amplified first input signal and second input signal, a third coil magnetically coupled with the second coil, and a first capacitor coupled between both ends of the third coil, wherein one end of the first capacitor is coupled to a ground node.Type: GrantFiled: November 19, 2009Date of Patent: January 10, 2012Assignee: Renesas Electronics CorporationInventors: Akihiko Furukawa, Tsuyoshi Kawakami, Yasuhiro Kagawa, Satoshi Yamakawa
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Publication number: 20110063028Abstract: A power amplifier comprises a plurality of primary inductors provided on a substrate in a circular geometry as a whole; a plurality of amplifier pairs; a secondary inductor; and a connection wiring. Each amplifier pair is coupled to two ends of a corresponding primary inductor, and amplifies and output to the corresponding primary inductor a pair of first and second signals given as differential input signals, respectively. The secondary inductor is provided adjacent to the primary inductors in a circular geometry, further combines and outputs signals made by combining first and second signals in each primary inductor. The connection wiring is provided inside the primary inductors on the substrate and electrically couples middle points of respective primary inductors with each other.Type: ApplicationFiled: September 15, 2010Publication date: March 17, 2011Inventors: Tsuyoshi KAWAKAMI, Akihiko Furukawa, Satoshi Yamakawa
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Patent number: 7818287Abstract: Disclosed is a storage management system including at least one client, a first server having a primary storage, a second server having a secondary storage, and an intermediate device logically arranged between the client and the first and second servers. The primary storage includes a stub file in which there is recorded the position information of the real file migrated from the primary storage to the secondary storage. The intermediate device exercises control so that, when a file access request of the primary storage of a first server, issued by the client, is received by the intermediate device, the intermediate device receives the file access request and, if the file to be accessed is a stub file, and the access request necessitates accessing to the real file, the intermediate device accesses the real file of the secondary storage using the information of the stub file to return a response.Type: GrantFiled: November 7, 2005Date of Patent: October 19, 2010Assignee: NEC CorporationInventors: Takashi Torii, Satoshi Yamakawa, Yoshihiro Kajiki
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Patent number: 7765189Abstract: When a migration object is a stub file, a data migration apparatus, which migrates data from a source HSM execution environment to a destination HSM execution environment, reads data from source secondary storage based on a data storage address in the source secondary storage. This data storage address is stored in the stub file in source primary storage. The apparatus writes the data into destination secondary storage according to a rule for storing data and reads attribute information on the stub file stored in the source primary storage. The apparatus creates, in destination primary storage, a stub file having the same name as in the source and, according to the stub file generation format in the destination primary storage, supplies the address of the data stored in the destination secondary storage and attribute information acquired from the source primary storage to the created stub file to complete the data migration.Type: GrantFiled: July 9, 2007Date of Patent: July 27, 2010Assignee: NEC CorporationInventor: Satoshi Yamakawa