Patents by Inventor Seiji Miyoshi
Seiji Miyoshi 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: 7286495Abstract: A digital subscriber line transmission (xDSL)-, system includes a transmitting side which transmits training symbols by adding some data that is contained in a training symbol sequence onto at least one of the beginning and the end of this symbol sequence and then transmits the training symbol sequence. A receiving side removes the data that has been added onto the training symbol sequence and executes training processing. The length of the training symbol sequence and of a transmit symbol sequence at time of normal communication is set in such a manner that the symbol sequence will not fall within an interval in which effects of near-end crosstalk from a neighboring line are received. The data added to the training symbol sequence specifies an interval in which effects of the crosstalk are received.Type: GrantFiled: June 23, 2005Date of Patent: October 23, 2007Assignee: Fujitsu LimitedInventors: Kazutomo Hasegawa, Hidetake Asahina, Seiji Miyoshi, Nobukazu Koizumi, Yutaka Awata
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Publication number: 20070161508Abstract: Disclosed is an exhaust gas purifying catalyst, which comprises an oxygen absorbing material having a catalytic noble metal arranged at a lattice position or an interlattice position of a crystal structure of a composite oxide containing Ce and Zr, which is capable of sufficiently exhibiting a catalytic function even if a ZrO2 mass ratio is out of the range of 20 to 30 mass % or 65 to 90 mass %. Specifically, in an exhaust gas purifying catalyst formed with a catalyst layer including a cerium-zirconium (CeZr) composite oxide, the composite oxide contains ceria (CeO2) and zirconia (ZrO2) in such a manner that a mass ratio of ceria to a total mass of ceria and zirconia falls within the range of 36 to 64 mass %. Further, the composite oxide contains, in the form of an oxide, a rare-earth metal other than cerium (Ce), in the range of 3 to 20 mass % with respect to a total mass of the composite oxide.Type: ApplicationFiled: December 12, 2006Publication date: July 12, 2007Inventors: Koji Minoshima, Seiji Miyoshi, Hiroshi Yamada, Akihide Takami
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Publication number: 20070117715Abstract: An exhaust gas purification catalyst comprises an oxygen storage component constituted by a mixed oxide containing cerium and zirconium, and a catalytic metal and a NOx storage component are carried on the oxygen storage component. The oxygen storage component is in the form of porous secondary particles in each of which primary particles of an average particle size of less than 10 nm cohere to form fine pores inside each said secondary particle.Type: ApplicationFiled: October 20, 2006Publication date: May 24, 2007Applicant: MAZDA MOTOR CORPORATIONInventors: Seiji Miyoshi, Hiroshi Yamada, Hideharu Iwakuni, Koichiro Harada, Koji Minoshima, Akihide Takami
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Publication number: 20070117716Abstract: An exhaust gas purification catalyst comprises: an oxygen storage component constituted by a mixed oxide containing cerium and zirconium; and a catalytic metal carried on the oxygen storage component. The oxygen storage component is in the form of hollow secondary particles each formed so that primary particles of an average particle size of less than 10 nm cohere into a shell.Type: ApplicationFiled: November 2, 2006Publication date: May 24, 2007Applicants: TODA KOGYO CORPORATION, MAZDA MOTOR CORPORATIONInventors: Tomohiro Honda, Tomoaki Urai, Ryota Fujimoto, Seiji Miyoshi, Hiroshi Yamada, Hideharu Iwakuni, Koichiro Harada, Koji Minoshima, Akihide Takami
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Publication number: 20070093381Abstract: An exhaust gas purifying catalyst comprising: a honeycomb-like substrate disposed in an exhaust passage for an engine; and a catalytic layer formed on a cell wall of said substrate, said catalytic layer including a mixed oxide which contains Ce (cerium) and Zr (zirconium), and retains a catalytic noble metal in such a manner that said noble metal atoms are located at crystal lattice points or between the lattice points of the mixed oxide, wherein said mixed oxide includes a first mixed oxide containing CeO2 in a mass greater than that of ZrO2, and a second mixed oxide containing ZrO2 in a mass greater than that of CeO2.Type: ApplicationFiled: October 12, 2006Publication date: April 26, 2007Applicant: MAZDA MOTOR CORPORATIONInventors: Seiji Miyoshi, Hiroshi Yamada, Koji Minoshima, Akihide Takami, Hideharu Iwakuni
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Patent number: 7173984Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side including a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side including a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: August 13, 2004Date of Patent: February 6, 2007Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
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Patent number: 7167509Abstract: A digital subscriber line communicating system for communicating between a transmitting side and a receiving side tough a communication line, the system including a hyperframe counter for periodically counting a predetermined number of continuous transmitting data symbols constituting a hyperframe synchronized with a timing signal, and a decoder for discriminating, based on the count value of the hyperframe counter, whether a transmitting data symbol belongs to a FEXTR, or a NEXTR. A sequencer is provided for initializing the status during an initialization period before starting usual communication. The initialization period includes an activation and acknowledgement sequence, a transceiver training sequence, a channel analysis sequence, and an exchange sequence. According to a single bitmap mode, the initialization is carried out by transmitting modulated symbols through only inside of the sliding window.Type: GrantFiled: March 2, 2005Date of Patent: January 23, 2007Assignee: Fujitsu LimitedInventors: Kazutomo Hasegawa, Seiji Miyoshi, Yutaka Awata, Takashi Sasaki, Nobukazu Koizumi
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Patent number: 7126995Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side having a sliding window transmitting unit for transmitting DMT symbols according to the sliding window trough the telephone line to the receiving side, and the receiving side having a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: August 13, 2004Date of Patent: October 24, 2006Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
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Publication number: 20060233678Abstract: The present invention is intended to ensure the improvement in catalytic performance of an exhaust gas catalytic converter, which is an essential performance thereof, ensure the thermal resistance thereof and downsize the converter, i.e., improve the arrangeability thereof. The exhaust gas catalytic converter has an upstream catalyst and a downstream catalyst which are arranged in upstream and downstream sides of an engine exhaust passage through which exhaust gas flows. Each of the upstream catalyst and the downstream catalyst contains an oxygen storage component. The oxygen storage component in the upstream catalyst has a structure in which Rh atoms are placed at or between crystal lattice points of a mixed oxide containing Ce and Zr and has a larger amount of oxygen storage than the oxygen storage component in the downstream catalyst under the same temperature conditions.Type: ApplicationFiled: March 7, 2006Publication date: October 19, 2006Applicant: MAZDA MOTOR CORPORATIONInventors: Seiji Miyoshi, Hiroshi Yamada, Akihide Takami
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Patent number: 7111452Abstract: There are provided NOx trap catalyst to trap and release NOx based on air-fuel ratio, first fuel supply means for supplying gasoline, second fuel supply means for supplying hydrogen, engine operation detecting means for detecting engine operating condition, fuel ratio changing means for changing the ratio of gasoline and hydrogen, NOx release determining means for determining whether it is required for the NOx to be released based on a state of the trapped NOx, NOx releasing means for releasing the NOx trapped by making the air-fuel ratio rich when the NOx releasing requirement is determined, gasoline ratio increasing means for increasing the ratio of gasoline when NOx releasing requirement is determined and the air-fuel-ratio rich control is executed. Accordingly, improper vibrations or noises can be restrained from occurring when the rich air-fuel-ratio control is executed to release the trapped NOx from the NOx trap catalyst.Type: GrantFiled: February 3, 2005Date of Patent: September 26, 2006Assignee: Mazda Motor CorporationInventors: Seiji Miyoshi, Hiroshi Yamada, Akihide Takami
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Patent number: 7088783Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side including a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side including a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reducedType: GrantFiled: August 13, 2004Date of Patent: August 8, 2006Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
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Patent number: 7072386Abstract: A digital subscriber line communicating system for communicating between a transmitting side and a receiving side through a communication line, comprising a hyperframe counter for periodically counting a predetermined number of continuous transmitting data symbols constituting a hyperframe synchronized with a timing signal, and a decoder for discriminating, based on the count value of the hyperframe counter, whether a transmitting data symbol belongs to a FEXTR or a NEXTR. A sequencer is provided for initializing the status during an initialization period before starting usual communication. The initialization period includes an activation and acknowledgement sequence, a transceiver training sequence, a channel analysis sequence, and an exchange sequence. According to a single bitmap mode, the initialization is carried out by transmitting modulated symbols through only inside of said sliding window.Type: GrantFiled: June 18, 1999Date of Patent: July 4, 2006Assignee: Fujitsu LimitedInventors: Kazutomo Hasegawa, Seiji Miyoshi, Yutaka Awata, Takashi Sasaki, Nobukazu Koizumi
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Publication number: 20060128562Abstract: Catalytic converter comprises a carrier having exhaust gas passages therein, a lower catalytic layer coated over the carrier and comprising hollow oxide powder loaded with catalytic metal, and an upper catalytic layer coated over the lower catalytic layer, directly exposed to exhaust gas flowing in the exhaust gas passages and comprising solid oxide powder loaded with catalytic metal. The hollow oxide powder may be ceria or alumina base oxide. Further it may be mixed oxide such as Ce—Zr mixed oxide or La contained alumina as well.Type: ApplicationFiled: November 29, 2005Publication date: June 15, 2006Applicant: Mazda Motor CorporationInventors: Seiji Miyoshi, Akihide Takami, Hiroshi Yamada, Masaaki Akamine, Hideharu Iwakuni, Koichiro Harada
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Publication number: 20060052242Abstract: In an exhaust gas purification catalyst comprising a honeycomb support and a catalytic layer that is formed on wall surfaces of each cell of the honeycomb support and contains active alumina and a mixed oxide containing Ce, Zr and Nd and doped with catalytic precious metal, the mixed oxide has a CeO2/ZrO2 mass ratio of 1.4 or more and the ratio of Nd2O3/(CeO2+ZrO2+Nd2O3) in the mixed oxide is 20 mass % or less.Type: ApplicationFiled: August 10, 2005Publication date: March 9, 2006Inventors: Hideharu Iwakuni, Asako Sadai, Masaaki Akamine, Seiji Miyoshi, Hiroshi Yamada, Akihide Takami
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Publication number: 20060019824Abstract: A Ce—Zr mixed oxide is employed as an oxygen storage component for a lean-NOx catalyst, and catalytic precious metal atoms are placed at and/or between crystal lattice points of the mixed oxide. This structure prevents the sintering of the precious metal and accelerates movement of oxygen ions in each of crystallites of the Ce—Zr mixed oxide to increase the oxygen storage/release amount of the mixed oxide, which enhances the NOx removal performance of the catalyst.Type: ApplicationFiled: July 12, 2005Publication date: January 26, 2006Applicant: MAZDA MOTOR CORPORATIONInventors: Seiji Miyoshi, Hiroshi Yamada, Akihide Takami
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Patent number: 6965617Abstract: A subscriber communication machine is provided with an off-synchronous detector detecting off-synchronization of communication with an office communication machine, a correlation processor, when the off-synchronization is detected, correlatively processing received data received over a communication line and held data having been transmitted from the office communication machine, and a resynchronization controller specifying a synchronous timing by the correlation process in the correlation processor to establish resynchronization in the communication with the office communication machine. When the subscriber communication machine cannot keep synchronization with a transmission cycle in a predetermined transmission system such as TCM in steady communication, it is possible to promptly resume the communication without the necessity for initializing all over again.Type: GrantFiled: December 20, 2000Date of Patent: November 15, 2005Assignee: Fujitsu LimitedInventors: Kazutomo Hasegawa, Seiji Miyoshi, Nobukazu Koizumi
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Patent number: 6965649Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: May 25, 1999Date of Patent: November 15, 2005Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
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Publication number: 20050237954Abstract: When training carried out prior to data communication is performed in digital subscriber line transmission (xDSL), the side which transmits training symbols adds some data that is contained in a training symbol sequence onto at least one of the beginning and end of this symbol sequence and then transmits the training symbol sequence. The receiving side removes the data that has been added onto the training symbol sequence and executes training processing. The length of the training symbol sequence and of a transmit symbol sequence at time of normal communication is set in such a manner that the symbol sequence will not fall within an interval in which effects of near-end crosstalk from a neighboring line are received.Type: ApplicationFiled: June 23, 2005Publication date: October 27, 2005Inventors: Kazutomo Hasegawa, Hidetake Asahina, Seiji Miyoshi, Nobukazu Koizumi, Yutaka Awata
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Publication number: 20050232171Abstract: When training carried out prior to data communication is performed in digital subscriber line transmission (xDSL), the side which transmits training symbols adds some data that is contained in a training symbol sequence onto at least one of the beginning and end of this symbol sequence and then transmits the training symbol sequence. The receiving side removes the data that has been added onto the training symbol sequence and executes training processing. The length of the training symbol sequence and of a transmit symbol sequence at time of normal communication is set in such a manner that the symbol sequence will not fall within an interval in which effects of near-end crosstalk from a neighboring line are received.Type: ApplicationFiled: June 23, 2005Publication date: October 20, 2005Inventors: Kazutomo Hasegawa, Hidetake Asahina, Seiji Miyoshi, Nobukazu Koizumi, Yutaka Awata
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Patent number: 6953769Abstract: A catalyst comprises an HC trapping material that is capable of trapping HC in an exhaust gas under low temperatures and releasing HC with a raise in temperature and catalytic material containing a Ce—Pr double oxide capable of oxidizing and purifying HC from the HC trapping material with a high efficiency.Type: GrantFiled: March 25, 2002Date of Patent: October 11, 2005Assignee: Mazda Motor CorporationInventors: Hiroshi Yamada, Seiji Miyoshi, Akihide Takami, Kenji Okamoto, Masahiko Shigetsu, Hisaya Kawabata