Patents by Inventor Hiroshi Shirota
Hiroshi Shirota 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: 7120216Abstract: A data/clock recovery circuit can recover high-rate data using the data as a clock signal. It includes an edge detector, a clock selection signal generating circuit, a clock selection circuit and a synchronizing circuit. The edge detector generates edge position information using a receiver output as a clock signal. The clock selection signal generating circuit generates a clock selection signal in response to the edge position information using the receiver output as the clock signal. The clock selection circuit selects a recovered clock signal from a clock signal group in response to the clock selection signal. The synchronizing circuit synchronizes the receiver output using the recovered clock signal, and outputs it as a synchronized data signal.Type: GrantFiled: July 12, 2002Date of Patent: October 10, 2006Assignees: Renesas Technology Corp., Mitsubishi Electric System LSI Design CorporationInventors: Hiroshi Shirota, Ryosuke Okuda, Katsuya Mizumoto, Kazuaki Tanida
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Patent number: 6911843Abstract: The number of pulses of a clock signal CLK-A is circularly counted in a count range from “0” to “7”, and count signals indicating count values are produced. A clock signal CLK-B having a frequency lower than that of the clock signal CLK-A is produced from count signals of “3” and “7”, and data transfer between a high speed operating block operated in synchronization with the clock signal CLK-A and a low speed operating block operated in synchronization with the clock signal CLK-B is performed in synchronization with the clock signal CLK-B to receive input serial data or transmit output serial data. When a stuff bit of universal Serial Bus is detected in the input serial data or is inserted in the output serial data, a cycle of the clock signal CLK-B is lengthened by one cycle of the clock signal CLK-A.Type: GrantFiled: January 28, 2003Date of Patent: June 28, 2005Assignees: Renesas Technology Corp., Mitsubishi Electric System, LSI Design CorporationInventors: Katsuya Mizumoto, Hiroshi Shirota, Ryosuke Okuda, Kazuaki Tanida
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Publication number: 20040254128Abstract: The invention provides methods of treating and preventing heat shock protein-associated diseases and conditions.Type: ApplicationFiled: July 26, 2004Publication date: December 16, 2004Inventors: Seiichi Kobayashi, Minghuang Zhang, Hiroshi Shirota
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Publication number: 20040224936Abstract: The present invention provides compositions comprising compounds having formula (I): 1Type: ApplicationFiled: September 9, 2003Publication date: November 11, 2004Inventors: Kenichi Chiba, Hong Du, Yoshihito Eguchi, Masanori Fujita, Masaki Goto, Fabian Gusovsky, Jean-Christophe Harmange, Atsushi Inoue, Megumi Kawada, Takatoshi Kawai, Yoshiyuki Kawakami, Akifumi Kimura, Makoto Kotake, Yoshikazu Kuboi, Tomohiro Matsushima, Yoshiharu Mizui, Kenzo Muramoto, Hideki Sakurai, Yong-Chun Shen, Hiroshi Shirota, Mark Spyvee, Isao Tanaka, John (Yuan) Wang, Ray Wood, Satoshi Yamamoto, Naoki Yoneda
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Publication number: 20040205416Abstract: A clock supply select circuit controls supply of receive clock and transmit clock to a receiver and a transmitter. The clock supply select circuit includes a clock generate circuit generating internal clock of the reference, and clock modulate circuit generating a modulate clock signal modulated such that at least one of frequency fluctuation, phase fluctuation, waveform fluctuation and jitter is applied to the internal clock. In a normal operation mode, the internal clock is supplied as receive clock and transmit clock, and in a loopback operation mode, while the internal clock is supplied as receive clock, modulate clock signal is supplied as transmit clock.Type: ApplicationFiled: July 11, 2003Publication date: October 14, 2004Applicant: RENESAS TECHNOLOGY CORPInventor: Hiroshi Shirota
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Publication number: 20040027167Abstract: The number of pulses of a clock signal CLK-A is circularly counted in a count range from “0” to “7”, and count signals indicating count values are produced. A clock signal CLK-B having a frequency lower than that of the clock signal CLK-A is produced from count signals of “3” and “7”, and data transfer between a high speed operating block operated in synchronization with the clock signal CLK-A and a low speed operating block operated in synchronization with the clock signal CLK-B is performed in synchronization with the clock signal CLK-B to receive input serial data or transmit output serial data. When a stuff bit of universal Serial Bus is detected in the input serial data or is inserted in the output serial data, a cycle of the clock signal CLK-B is lengthened by one cycle of the clock signal CLK-A.Type: ApplicationFiled: January 28, 2003Publication date: February 12, 2004Applicants: MITSUBISHI DENKI KABUSHIKI KAISHA, MITSUBISHI ELECTRIC SYSTEM LSI DESIGN CORPORATIONInventors: Katsuya Mizumoto, Hiroshi Shirota, Ryosuke Okuda, Kazuaki Tanida
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Publication number: 20030172241Abstract: A FIFO circuit includes a write counter circuit, a memory circuit, a read counter circuit and a selector circuit. The write counter circuit counts a write clock signal during a valid period of input data, and outputs a write counter value. The memory circuit stores the input data in response to the write counter value. The read counter circuit counts a read clock signal when a decision is made that the memory circuit includes data that has not yet been read out, and outputs a read counter value. The read selector circuit reads data from the memory circuit in response to the read counter value. A small scale FIFO circuit can be obtained.Type: ApplicationFiled: August 19, 2002Publication date: September 11, 2003Inventor: Hiroshi Shirota
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Publication number: 20030142773Abstract: A data/clock recovery circuit can recover high-rate data using the data as a clock signal. It includes an edge detector, a clock selection signal generating circuit, a clock selection circuit and a synchronizing circuit. The edge detector generates edge position information using a receiver output as a clock signal. The clock selection signal generating circuit generates a clock selection signal in response to the edge position information using the receiver output as the clock signal. The clock selection circuit selects a recovered clock signal from a clock signal group in response to the clock selection signal. The synchronizing circuit synchronizes the receiver output using the recovered clock signal, and outputs it as a synchronized data signal.Type: ApplicationFiled: July 12, 2002Publication date: July 31, 2003Inventors: Hiroshi Shirota, Ryosuke Okuda, Katsuya Mizumoto, Kazuaki Tanida
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Patent number: 6274934Abstract: A semiconductor device and a method of manufacturing thereof are provided so as to make a spare electronic circuit available without changing arrangement of normal electronic circuit interconnections under a design rule. In order to achieve this, second metal interconnections as spare electronic circuit interconnections are preliminary formed in a region where the spare inverter circuit is formed.Type: GrantFiled: January 21, 2000Date of Patent: August 14, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Hiroshi Shirota
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Patent number: 5527948Abstract: Naphthalene derivatives of the formula: ##STR1## wherein R.sup.1, represents a hydrogen atom, a lower alkyl group or an acyl group; R.sup.2 independently represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a cycloalkyl group, a cycloalkylalkyl group, a hydroxyl group, an aryl group which may be substituted, an arylalkyl group whose aryl group may be substituted, a heteroaryl group, or a heteroaryllakyl group; R.sup.3 represents a hydrogen atom, a lower alkyl group, a lower alkenyl group, an aryl group which may have a substituent, an arylalkyl group whose aryl group may be substituted, an arylalkenyl group whose aryl group may be substituted, a cycloalkyl group, an alkoxyalkyl group, a heteroaryl group, a heteroarylalkyl group, a carboxyl group, a carboxyalkyl group, an aminoalkyl group, or a cyano group; R.sup.6 is C.sub.1-6 alkyl; and m is 0 or an integer of from 1 to 2 useful in treating autoimmune diseases are disclosed.Type: GrantFiled: March 13, 1995Date of Patent: June 18, 1996Assignee: Eisai Corp. Ltd.Inventors: Makoto Okita, Hiroshi Shirota, Masayuki Tanaka, Toshihiko Kaneko, Katsuya Tagami, Shigeki Hibi, Yasushi Okamoto, Seiichiro Nomoto, Takeshi Suzuki, Kenichi Chiba, Masaki Goto, Ryoichi Hashida, Hideki Ono, Hideto Ohhara, Hideki Sakurai, Shigeru Souda, Yoshimasa Machida, Kouichi Katayama, Isao Yamatsu
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Patent number: 5298649Abstract: A naphthalene derivative having the formula is new and useful for medicine. ##STR1## wherein R.sup.1 represents a hydrogen atom, a lower alkyl group or an acyl group;R.sup.2 independently represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a cycloalkyl group, a cycloalkylalkyl group, a hydroxyl group, an aryl group which may be substituted, an arylalkyl group whose aryl group may be substituted, a heteroaryl group, or a heteroarylalkyl group;R.sup.3 and R.sup.4 are the same or different and represent a hydrogen atom, a lower alkyl group, a lower alkenyl group, an aryl group which may have a substituent, an arylalkyl group whose aryl group may be substituted, an arylalkenyl group whose aryl group may be substituted, a cycloalkyl group, an alkoxyalkyl group, a heteroaryl group, a heteroarylalkyl group, a carboxyl group, a carboxyalkyl group, an aminoalkyl group, or a cyano group;R.sup.5 represents a group of the formula, --OR.sup.7, (wherein R.sup.Type: GrantFiled: October 10, 1991Date of Patent: March 29, 1994Assignee: Eisai Co., Ltd.Inventors: Makoto Okita, Hiroshi Shirota, Masayuki Tanaka, Toshihiko Kaneko, Katsuya Tagami, Shigeki Hibi, Yasushi Okamoto, Seiichiro Nomoto, Takeshi Suzuki, Kenichi Chiba, Masaki Goto, Ryoichi Hashida, Hideki Ono, Hideto Ohhara, Hideki Sakurai, Shigeru Souda, Yoshimasa Machida, Kouichi Katayama, Isao Yamatsu
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Patent number: 5262565Abstract: Compounds of the formula: ##STR1## where R.sup.1 is a hydrogen atom or a lower alkyl group;R.sub.2 is a lower alkoxy group;R.sub.3 is a hydroxyl or lower alkoxy group;Z is represented by the formula: ##STR2## where R.sub.2 and R.sub.3 may be the same or different from each other and each stands for a hydrogen atom or a lower alkyl;Y is represented by the formula: --(CH.sub.2).sub.n -- where n is 0 or an integer of 1 to 2 or a group represented by the formula: ##STR3## where R.sup.2 and R.sup.3 may be the same or different from each other and each stands for a lower alkyl group; andR.sup.4 represents a group of the formula: ##STR4## where p is 0 or an integer of 1 to 3 and R.sup.12 is hydrogen, a halogen atom, a lower alkyl or a lower alkoxy group a hydrogen atom, R.sup.2 is a methoxy group, R.sup.3 is a hydroxy group and R.sup.4 is a benzyl group having anti-inflammatory activity.Type: GrantFiled: November 12, 1991Date of Patent: November 16, 1993Assignee: Eisai Co., Ltd.Inventors: Hiroyuki Yoshimura, Shinya Abe, Tetsuya Kawahara, Takashi Inoue, Hiroshi Shirota, Kenichi Chiba, Kenichi Kusube, Toru Horie, Takeshi Suzuki, Isao Yamatsu, Naoyuki Shimomura, Kazuo Okano, Richard S. J. Clark, Takashi Mori, Shuhei Miyazawa, Ryoichi Hashida, Kenzo Muramoto, Koukichi Harada
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Patent number: 5237091Abstract: The present invention relates to a naphthalene derivative. More particularly, it relates to a naphthalene derivative exhibiting an excellent activity as a drug.Type: GrantFiled: May 29, 1992Date of Patent: August 17, 1993Assignee: Eisai Co., Ltd.Inventors: Hiroyuki Yoshimura, Shinya Abe, Tetsuya Kawahara, Naoyuki Shimomura, Kazuo Okano, Richard S. J. Clark, Takashi Mori, Shuhei Miyazawa, Ryoichi Hashida, Kenzo Muramoto, Koukichi Harada, Takashi Inoue, Hiroshi Shirota, Kenichi Chiba, Kenichi Kusube, Toru Horie, Takeshi Suzuki, Isao Yamatsu
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Patent number: 5134111Abstract: A naphthalene derivative having the formula is new and useful for medicine. ##STR1## [wherein R.sup.1 represents a hydrogen atom, a lower alkyl group or an acyl group;R.sup.2 independently represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a cycloalkyl group, a cycloalkylalkyl group, a hydroxyl group, an aryl group which may be substituted, an arylalkyl group whose aryl group may be substituted, a heteroaryl group, or a heteroarylalkyl group;R.sup.3 and R.sup.4 are the same or different and represent a hydrogen atom, a lower alkyl group, a lower alkenyl group, an aryl group which may have a substituent, an arylalkyl group whose aryl group may be substituted, an arylalkenyl group whose aryl group may be substituted, a cycloalkyl group, an alkoxyalkyl group, a heteroaryl group, a heteroarylalkyl group, a carboxy group, a carboxyalkyl group, an aminoalkyl group, or a cyano group;R.sup.5 represents a group of the formula, --OR.sup.7, (wherein R.sup.Type: GrantFiled: December 15, 1989Date of Patent: July 28, 1992Assignee: Eisai Co., Ltd.Inventors: Makoto Okita, Hiroshi Shirota, Masayuki Tanaka, Toshihiko Kaneko, Katsuya Tagami, Shigeki Hibi, Yasushi Okamoto, Seiichiro Nomoto, Takeshi Suzuki, Kenichi Chiba, Masaki Goto, Ryoichi Hashida, Hideki Ono, Hideto Ohhara, Hideki Sakurai, Shigeru Souda, Yoshimasa Machida, Kouichi Katayama, Isao Yamatsu
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Patent number: 4833160Abstract: 3-(3,5-di-tert-butyl-4-hydroxy-benzylidene)-2-pyrrolidone and N-substituted derivatives thereof are described. The substituent includes alkyl, alkoxy, alkynyl phenyl-alkylene, hydroxy-alkylene and amino-alkylene. They are effective as an anti-inflammatory, analgesic and antithermic agent, and they have a low toxicity.Type: GrantFiled: April 23, 1986Date of Patent: May 23, 1989Assignee: Eisai Co., Ltd.Inventors: Hironori Ikuta, Youji Yamagishi, Kozo Akasaka, Isao Yamatsu, Seiichi Kobayashi, Hiroshi Shirota, Kouichi Katayama