Patents by Inventor Takaaki Sato
Takaaki Sato 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: 9227386Abstract: A method for manufacturing a resin-based composite material includes: a stage in which prepregs are stacked on a jig; a stage in which the stacked prepregs and the jig are covered and pressurized heat treatment is applied thereto to form a first semi-molded article and a second semi-molded article; a stage in which board thicknesses of the first semi-molded article and the second semi-molded article are measured, a stage in which the number of additional plies is determined based on the measured board thicknesses, a desired board thickness of the resin-based composite material, and physical properties of the additional plies; and a stage in which a layered product is formed by stacking the predetermined number of additional plies between the first semi-molded article and the second semi-molded article, the layered product and the jig are covered with a bagging material, and pressurized heat treatment is applied thereto.Type: GrantFiled: June 3, 2011Date of Patent: January 5, 2016Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidetaka Hattori, Hideki Horizono, Takaaki Sato, Tadashi Yazaki
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Patent number: 9218816Abstract: In a DAC device, a distortion correction function g1(x) of a harmonic obtained from a result of a frequency analysis on an analog output signal of a DAC circuit is obtained. A correction value is determined based on the correction function g1(x) in accordance with an input digital signal, and is previously stored in a memory. A nonlinear correction circuit reads a corresponding correction value from the memory in accordance with the value of a digital signal output from a digital filter, and transmits the correction value to a subtractor. The subtractor subtracts the correction value from the digital signal output from the digital filter.Type: GrantFiled: March 13, 2014Date of Patent: December 22, 2015Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Toshihiro Torii, Yoshihiro Horii, Masashi Uchida, Junji Nakatsuka, Takaaki Sato
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Patent number: 9078185Abstract: A mobile communication system 100 includes a selection unit 25 configured to select a transition target frequency from the plurality of frequencies when a condition under which a mobile communication terminal not utilize a transition source frequency being any of the plurality of frequencies is fulfilled, and an instruction unit 22 configured to instruct the mobile communication terminal to perform a transition to the transition target frequency selected by the selection unit. The selection unit 25 excludes the transition source frequency from a frequency candidate to be utilized by the mobile communication terminal until an elapsed time after the instruction of the transition to the transition target frequency exceeds a predetermined time.Type: GrantFiled: March 23, 2011Date of Patent: July 7, 2015Assignee: NTT DOCOMO, INC.Inventors: Takayuki Tsuneda, Hiroyuki Hosono, Takaaki Sato, Takeshi Terayama, Masafumi Masuda
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Patent number: 8983428Abstract: In a mobile communication system according to the present invention, the mobile communication system is configured to manage a specific mobile station which is allowed to communicate through a CSG cell under the control of a home base station (Home-eNB); and a general mobile station (UE) other than the specific mobile station is configured to be capable of using the CSG cell as a camped cell, only when broadcast information indicating an allowance of a camping in the specific cell is received.Type: GrantFiled: October 28, 2008Date of Patent: March 17, 2015Assignee: NTT DOCOMO, INC.Inventors: Mikio Iwamura, Masafumi Masuda, Takaaki Sato, Takehiro Nakamura
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Patent number: 8980016Abstract: An acidic chromium-free solution for treating a metal surface containing: a vanadium cation source and/or a vanadyl cation source; an organic acid as an anion source; and at least one oxoacid as another anion source is provided. The oxoacid is selected from oxoacids of nitrogen, sulfur, phosphorus, boron, and chlorine. A metal component composed of, for example, aluminum or magnesium is brought into contact with the chromium-free solution to form a vanadium coating film of a surface of the metal component. A surface treating process using this chromium-free solution is useful for formation of a coating film having low corrosion resistance and low electric resistance.Type: GrantFiled: October 27, 2010Date of Patent: March 17, 2015Assignee: Nihon Hyomen Kagaku Kabushiki KaishaInventors: Takaaki Sato, Misa Suzuki
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Patent number: 8897738Abstract: A mobile communication system in which a home cell limits access from a first mobile station, and when the first mobile station communicating via a macro cell using the same frequency as the home cell enters a predetermined area near the home cell, the first mobile station is caused to perform handover to a different-frequency macro cell selected from among macro cells covering the predetermined area and using frequencies different from that used in the home cell.Type: GrantFiled: January 10, 2013Date of Patent: November 25, 2014Assignee: NTT DoCoMo, Inc.Inventors: Kenichiro Aoyagi, Takaaki Sato
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Patent number: 8831673Abstract: A base station outputs annunciation information which corresponds to a plurality of radio cells established by a 3G public base station and an LTE public base station and which is different from annunciation information output from the 3G public base station and the LTE public base station into a target region X and forms a radio cell. A mobile station that enters the radio cell receives the annunciation information of the radio cell and executes a position registration process. An information administration device can thereby find the mobile station based on the position registration process even in the environment where a plurality of radio cells to which different frequencies are assigned are established geographically overlapping with one another.Type: GrantFiled: December 9, 2010Date of Patent: September 9, 2014Assignee: NTT DoCoMo, Inc.Inventors: Takeshi Okamoto, Hiroyuki Hosono, Takeshi Terayama, Takaaki Sato
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Publication number: 20140195225Abstract: In a DAC device, a distortion correction function g1(x) of a harmonic obtained from a result of a frequency analysis on an analog output signal of a DAC circuit is obtained. A correction value is determined based on the correction function g1(x) in accordance with an input digital signal, and is previously stored in a memory. A nonlinear correction circuit reads a corresponding correction value from the memory in accordance with the value of a digital signal output from a digital filter, and transmits the correction value to a subtractor. The subtractor subtracts the correction value from the digital signal output from the digital filter.Type: ApplicationFiled: March 13, 2014Publication date: July 10, 2014Applicant: PANASONIC CORPORATIONInventors: Toshihiro TORII, Yoshihiro HORII, Masashi UCHIDA, Junji NAKATSUKA, Takaaki SATO
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Patent number: 8737224Abstract: Disclosed is a communication method for switching between a first connection state, in which a data unit is transmitted in a first size, and a second connection state, in which a data unit is transmitted in a second size which is larger than the first size. The communication method comprises a step of maintaining the size of a data unit at the first size in a case where there is a transition from the first connection state to the second connection state after there had been a transition from the second connection state to the first connection state.Type: GrantFiled: July 2, 2010Date of Patent: May 27, 2014Assignee: NTT DoCoMo, Inc.Inventors: Takahiro Hayashi, Masafumi Masuda, Hidehiro Ando, Takaaki Sato, Yoshiyuki Yasuda
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Patent number: 8565751Abstract: A mobile communication method according to the present invention includes a step A of offering a particular service through a second radio data link established between a mobile station and a cell in the second area in a state in which a first radio data link is not established between the mobile station and a cell in the first area and a step B of suspending the offer of the particular service through the second radio data link when the state in which the first radio data link is not established continues for a predetermined time period.Type: GrantFiled: November 7, 2008Date of Patent: October 22, 2013Assignee: NTT DoCoMo, Inc.Inventors: Yuichiro Nakamura, Masafumi Masuda, Takaaki Sato, Takanori Utano
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Patent number: 8553599Abstract: A mobile communication system in which a home cell limits access from a first mobile station, and when the first mobile station communicating via a macro cell using the same frequency as the home cell enters a predetermined area near the home cell, the first mobile station is caused to perform handover to a different-frequency macro cell selected from among macro cells covering the predetermined area and using frequencies different from that used in the home cell.Type: GrantFiled: March 5, 2009Date of Patent: October 8, 2013Assignee: NTT DoCoMo, Inc.Inventors: Kenichiro Aoyagi, Takaaki Sato
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Patent number: 8542651Abstract: In a communication system of a subscriber extension line system, there is provided a communication controller whereby the load of an unnecessary process to be applied on a communication controller relating to a destination of a mobile telephone is eliminated and the processing efficiency for communication control is enhanced. In a D-RNC which controls the communication of the mobile telephone and which is commonly connected with an S-RNC, the mobile telephone moves while maintaining the communication with the S-RNC. When the mobile telephone enters a cell relating to the D-RNC, the control data is transmitted or received between the S-RNC and the node for managing the mobile telephone.Type: GrantFiled: November 16, 2007Date of Patent: September 24, 2013Assignee: NTT DoCoMo, Inc.Inventors: Masafumi Masuda, Toyohiro Abe, Takaaki Sato, Katsuhiko Yamagata
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Patent number: 8542835Abstract: When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary user mobile identifier is authenticated, a normal incoming call acceptance procedure is executed. If the mobile station is authenticated although the temporary user mobile identifier is wrong, the network reassigns a new temporary user mobile identifier to the mobile station and stops the current communication. In communication, the network and the mobile station mutually notify encipherment-onset time and negotiate about encipherment manner with each other. In addition, diversity handover is commenced upon a call attempt. Furthermore, if a branch replacement is necessary, the current branch is replaced by new branches capable of executing the diversity handover.Type: GrantFiled: February 5, 2009Date of Patent: September 24, 2013Assignee: NTT DoCoMo, Inc.Inventors: Motoshi Tamura, Mutsumaru Miki, Akiko Okamoto, Kenya Kusunose, Akihiro Uchikoshi, Daisuke Igarashi, Katsuhiko Yamagata, Takaaki Sato, Junichiro Hagiwara, Yasuyuki Watanabe, Takuya Hamajima, Masafumi Hata, Nobutaka Ishikawa, Yoshiyuki Yasuda, Kazufumi Yunoki, Nobuhide Uchiyama
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Patent number: 8532655Abstract: A UE 10 includes a storage unit 12 configured to store a specific cell accessible by the mobile communication unit and a neighboring cell element for identifying a neighboring cell provided around the specific cell, while associating the specific cell and the neighboring cell element with each other, a search unit 14 configured to search for the specific cell accessible, and a registration unit 13 configured to register a element for identifying a transition source cell as the neighboring cell element, when the UE 10 is transitioned from the transition source cell to the specific cell stored in the storage unit 12.Type: GrantFiled: April 1, 2011Date of Patent: September 10, 2013Assignee: NTT DoCoMo, Inc.Inventors: Takayuki Tsuneda, Masafumi Masuda, Takaaki Sato
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Patent number: 8520649Abstract: A mobile communication method includes: a step which establishes a second radio access link between a mobile station and a radio communication data combining device for “an area limit service” via a radio base station for “a public area service” when a first radio access link is established between the mobile station and the radio communication data combining device for “the area limit service” via the radio base station for “the area limit service”; and a step in which the radio communication data combining device for “the area limit service” combines the data for “the area limit service” transferred from the radio base station for “the area limit service” and the data for “the area limit service” transferred from the radio base station for “the public area service.Type: GrantFiled: May 20, 2009Date of Patent: August 27, 2013Assignee: NTT DoCoMo, Inc.Inventors: Kenichiro Aoyagi, Masafumi Masuda, Yasuhiro Kawabe, Takaaki Sato
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Patent number: 8509784Abstract: A mobile communication method according to the present invention includes a step A of causing a mobile station in a standby mode in a first cell to transmit a communication start request signal, a step B of judging whether or not to measure communication quality of a second cell on the basis of judgment as to whether or not the particular service is provided in each of the cells and judgment as to whether or not communication quality of the second cell is included in the communication start request signal, the second cell overlaid by the first cell in a different frequency band and a step C of starting communication of the mobile station in either one of the first cell and the second cell on the basis of the measured communication quality of the second cell.Type: GrantFiled: November 11, 2008Date of Patent: August 13, 2013Assignee: NTT DoCoMo, Inc.Inventors: Masafumi Masuda, Yasuhiro Kawabe, Takaaki Sato, Ryoji Yamamoto, Katsuhiko Yamagata
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Patent number: 8472360Abstract: A mobile communication according to the present invention includes a step A of causing the mobile station to judge whether or not the mobile station is allowed to go into a standby mode in a cell corresponding to a predetermined pilot channel when the mobile station detects a predetermined operation made by a user and a step B of causing the mobile station to enter the standby in the cell when the mobile station judges that the mobile station is allowed to be in the standby mode in the cell.Type: GrantFiled: November 11, 2008Date of Patent: June 25, 2013Assignee: NTT DoCoMo, Inc.Inventors: Masafumi Masuda, Takaaki Sato
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Patent number: 8452282Abstract: A mobile communication method includes a mobile station transmitting a location registration request on the basis of a pilot signal, a network device judging, in response to the received location registration request, whether or not access to a specific radio base station from the mobile station is permitted, the network device rejecting location registration processing when the access is judged not to be permitted, and the network device making a determination so that the transmission power of the pilot signal in the specific radio base station is reduced when the number of rejections of location registration processing exceeds a predetermined number of times.Type: GrantFiled: March 31, 2009Date of Patent: May 28, 2013Assignee: NTT DoCoMo, Inc.Inventors: Masafumi Masuda, Kenichiro Aoyagi, Takaaki Sato, Ryoji Yamamoto
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Publication number: 20130112335Abstract: A method for manufacturing a resin-based composite material includes: a stage in which prepregs are stacked on a jig; a stage in which the stacked prepregs and the jig are covered and pressurized heat treatment is applied thereto to form a first semi-molded article and a second semi-molded article; a stage in which board thicknesses of the first semi-molded article and the second semi-molded article are measured, a stage in which the number of additional plies is determined based on the measured board thicknesses, a desired board thickness of the resin-based composite material, and physical properties of the additional plies; and a stage in which a layered product is formed by stacking the predetermined number of additional plies between the first semi-molded article and the second semi-molded article, the layered product and the jig are covered with a bagging material, and pressurized heat treatment is applied thereto.Type: ApplicationFiled: June 3, 2011Publication date: May 9, 2013Inventors: Hidetaka Hattori, Hideki Horizono, Takaaki Sato, Tadashi Yazaki
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Publication number: 20130065586Abstract: A UE 10 includes a storage unit 12 configured to store a specific cell accessible by the mobile communication unit and a neighboring cell element for identifying a neighboring cell provided around the specific cell, while associating the specific cell and the neighboring cell element with each other, a search unit 14 configured to search for the specific cell accessible, and a registration unit 13 configured to register a element for identifying a transition source cell as the neighboring cell element, when the UE 10 is transitioned from the transition source cell to the specific cell stored in the storage unit 12.Type: ApplicationFiled: April 1, 2011Publication date: March 14, 2013Applicant: NTT DOCOMO, INC.Inventors: Takayuki Tsuneda, Masafumi Masuda, Takaaki Sato