Patents by Inventor Takeo Koyama
Takeo Koyama 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: 11943006Abstract: A wireless communication system including a shield room forming section, leaky transmission line, first antenna, first device, second antenna and second device. The shield room forming section covers an internal space with an electromagnetic wave reflector that blocks wireless communication. The leaky transmission line is provided with first and second leakage parts arranged inside the shield room forming section. The first antenna is arranged inside the shield room forming section and configured to be wirelessly communicable with the first leakage part. The first device is arranged inside the shield room forming section and has the first antenna. The second antenna is arranged inside the shield room forming section and configured to be wirelessly communicable with the second leakage part. The second device is arranged inside the shield room forming section and has the second antenna. The first device and the second device perform direct two-way wireless communication with each-other.Type: GrantFiled: October 16, 2018Date of Patent: March 26, 2024Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Fumihito Soma, Takuya Koyama, Hidenobu Uda, Takeo Umemura
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Patent number: 8404847Abstract: The present invention provides a method for producing a compound represented by formula (A), the method comprising the steps of: (a) mixing a compound represented by formula (B) with p-toluenesulfonic acid or p-toluenesulfonic acid monohydrate at less than 1 molar equivalent with respect to the compound represented by formula (B) in a solvent under heating; (b) adding additional p-toluenesulfonic acid or p-toluenesulfonic acid monohydrate to the mixed solution under cooling, wherein the additional p-toluenesulfonic acid or p-toluenesulfonic acid monohydrate is added in such an amount that the total molar equivalent thereof with the p-toluenesulfonic acid or p-toluenesulfonic acid monohydrate of step (a) is 1 molar equivalent or more with respect to the compound represented by formula (B) of step (a); and (c) subsequently allowing the mixed solution to crystallize to obtain the compound represented by formula (A).Type: GrantFiled: June 17, 2011Date of Patent: March 26, 2013Assignee: Daiichi Sankyo Company, LimitedInventor: Takeo Koyama
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Patent number: 8357808Abstract: The problem to be solved is to provide an important intermediate for production of an FXa inhibitor. The solution thereto is a process for industrially producing a compound (1) represented by the following formula (1): wherein Boc represents a tert-butoxycarbonyl group.Type: GrantFiled: September 9, 2011Date of Patent: January 22, 2013Assignee: Daiichi Sankyo Company, LimitedInventors: Takeo Koyama, Satoshi Kondo
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Publication number: 20120041206Abstract: The problem to be solved is to provide an important intermediate for production of an FXa inhibitor. The solution thereto is a process for industrially producing a compound (1) represented by the following formula (1): wherein Boc represents a tert-butoxycarbonyl group.Type: ApplicationFiled: September 9, 2011Publication date: February 16, 2012Applicant: DAIICHI SANKYO COMPANY, LIMITEDInventors: Takeo Koyama, Satoshi Kondo
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Publication number: 20110275821Abstract: The present invention provides a method for producing a compound represented by formula (A), the method comprising the steps of: (a) mixing a compound represented by formula (B) with p-toluenesulfonic acid or p-toluenesulfonic acid monohydrate at less than 1 molar equivalent with respect to the compound represented by formula (B) in a solvent under heating; (b) adding additional p-toluenesulfonic acid or p-toluenesulfonic acid monohydrate to the mixed solution under cooling, wherein the additional p-toluenesulfonic acid or p-toluenesulfonic acid monohydrate is added in such an amount that the total molar equivalent thereof with the p-toluenesulfonic acid or p-toluenesulfonic acid monohydrate of step (a) is 1 molar equivalent or more with respect to the compound represented by formula (B) of step (a); and (c) subsequently allowing the mixed solution to crystallize to obtain the compound represented by formula (A).Type: ApplicationFiled: June 17, 2011Publication date: November 10, 2011Applicant: DAIICHI SANKYO COMPANY, LIMITEDInventor: Takeo KOYAMA
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Patent number: 6515142Abstract: A process for preparing a compound represented by general formulae (5) and (6) in the following reaction scheme or salts thereof, wherein R1 represents a protective group for a nitrogen atom; R2 represents a methanesulfonyl group or p-toluenesulfonyl group; R1 represents a hydrogen atom, an aralkyl group, or an alkyl group having 1 to 6 carbon atoms; and X represents a halogen atom. The above process is useful as an industrial process for preparing intermediates of anticoagulant aromatic amidine derivatives described in Japanese Patent Application Laid-Open (kokai) No. 208946/1993.Type: GrantFiled: November 7, 2001Date of Patent: February 4, 2003Assignee: Daiichi Pharmaceutical Co., Ltd.Inventors: Yukio Yokoyama, Tatsuya Kobayashi, Takeo Koyama
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Publication number: 20020062033Abstract: A process for preparing a compound represented by general formulae (5) and (6) in the following reaction scheme or salts thereof, wherein R1 represents a protective group for a nitrogen atom; R2 represents a methanesulfonyl group or p-toluenesulfonyl group; R3 represents a hydrogen atom, an aralkyl group, or an alkyl group having 1 to 6 carbon atoms; and X represents a halogen atom.Type: ApplicationFiled: November 7, 2001Publication date: May 23, 2002Applicant: DAIICHI PHARMACEUTICAL CO., LTD.Inventors: Yukio Yokoyama, Tatsuya Kobayashi, Takeo Koyama
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Patent number: 6337405Abstract: A process for preparing a compound represented by general formulae (5) and (6) in the following reaction scheme or salts thereof, wherein R1 represents a protective group for a nitrogen atom; R2 represents a methanesulfonyl group or p-toluenesulfonyl group; R3 represents a hydrogen atom, an aralkyl group, or an alkyl group having 1 to 6 carbon atoms; and X represents a halogen atom. Reaction Scheme: The above process is useful as an industrial process for preparing intermediates of anticoagulant aromatic amidine derivatives described in Japanese Patent Application Laid-Open (kokai) No. 208946/1993.Type: GrantFiled: December 22, 2000Date of Patent: January 8, 2002Assignee: Daiichi Pharmaceutical Co., Ltd.Inventors: Yukio Yokoyama, Tatsuya Kobayashi, Takeo Koyama
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Patent number: 6325720Abstract: A game machine comprises a housing, a lever pivotally supported on the housing and a control unit. The lever comprises a rod portion having a handle portion integrally formed at the front section and a sensor actuating portion integrally formed at the rear section. The game machine comprises a resiliently urging member for resiliently urging the rod portion toward a neutral position from first and second positions. The game machine further comprises first and second optical sensors positioned to have the lights intercepted by the sensor actuating portion of the lever when the rod portion of the lever is moved to the first and second positions, respectively. The control unit is operable to selectively perform predetermined first and second operations in accordance with signals outputted from the first and second optical sensors, respectively.Type: GrantFiled: November 12, 1998Date of Patent: December 4, 2001Assignee: Aruze CorporationInventors: Nakayasu Tsukahara, Mitsuaki Kusanagi, Takeo Koyama
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Patent number: 6252088Abstract: A process for preparing a compound represented by general formulae (5) and (6) in the following reaction scheme or salts thereof, wherein R1 represents a protective group for a nitrogen atom; R2 represents a methanesulfonyl group or p-toluenesulfonyl group; R3 represents a hydrogen atom, an aralkyl group, or an alkyl group having 1 to 6 carbon atoms; and X represents a halogen atom. The above process is useful as an industrial process for preparing intermediates of anticoagulant aromatic amidine derivatives described in Japanese Patent Application Laid-Open (kokai) No. 208946/1993.Type: GrantFiled: March 8, 1999Date of Patent: June 26, 2001Assignee: Daiichi Pharmaceutical Co., Ltd.Inventors: Yukio Yokoyama, Tatsuya Kobayashi, Takeo Koyama
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Patent number: 5581453Abstract: A switching type power supply apparatus decreases the amount of power used in computer and computer peripheral devices by utilizing a switching transistor which is set into switching operation responsive to a pulse signal received from a power source control circuit. This switching transistor controls the voltage applied to the primary winding of the power transformer by the switching transistor, and issues an output voltage from the secondary winding. The power supply apparatus includes a switch circuit which is connected in series to the starting resistor for supplying the output voltage rectified from the AC power source when starting up to the power supply control circuit. The power supply apparatus includes a switch control circuit which turns off the switch circuit when the output voltage rectified from the AC output of the tertiary winding of the power transformer reaches a voltage high enough for stable operation of the power supply control circuit.Type: GrantFiled: August 18, 1994Date of Patent: December 3, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitsunori Ueta, Takeo Koyama
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Patent number: 5331354Abstract: A power supply apparatus for the television receiver set comprising a television receiving circuit and other receiving circuits, for example, satellite broadcasting receiving circuit or character broadcasting receiving circuit, each of receiving circuit is supplied with a supply power from the same switching power supply of regenerative type having plural secondary windings wherein some receivers are selectively turned off by switches provided the receivers and the switching power supply for automatic recording or standby mode. The regenerative type of switching power supply has a stable output characteristic over a range from no load to the maximum load because of regenerative operation. The horizontal scanning circuit is turned off by the switch.Type: GrantFiled: September 25, 1991Date of Patent: July 19, 1994Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takeo Koyama, Takashi Nakano
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Patent number: 5236264Abstract: A linear bearing is constructed of a shaft having a cylindrical outer wall, an outer race having a cylindrical inner peripheral wall, a cylindrical retainer inserted for axial displacement within a toroidal space between the outer wall and the inner wall, and plural balls retained for rotation in the retainer and in contact with the outer wall and the inner wall. The balls are provided more densely at axially opposite end portions of the retainer.Type: GrantFiled: June 9, 1992Date of Patent: August 17, 1993Assignee: NSK Ltd.Inventors: Toshio Matsubara, Takeo Koyama, Magozo Hamamoto, Shoichiro Koike
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Patent number: 4775651Abstract: Silanes are produced by the disproportionation and/or redistribution reaction of chlorosilanes using a novel catalyst having a longer life and consisting of a quaternary phosphonium salt bonded to an organic macromolecule or polymer, represented by the following general formula: ##STR1## wherein .circle.P.circle. is an organic macromolecule or polymer, A is a bridging group between phosphorus and the organic macromolecule or polymer, R.sup.1, R.sup.2 and R.sup.3 are selected from the group consisting of hydrogen, C.sub.1 -C.sub.20 alkyl groups and aralkyl groups such as benzyl and phenethyl groups, which can contain oxygen or halogen atoms, and X is a halogen atom.Type: GrantFiled: November 17, 1987Date of Patent: October 4, 1988Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Mamoru Tachikawa, Kazutoshi Takatsuna, Kouji Shiozawa, Yoshiharu Okumura, Takeo Koyama
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Patent number: 4725420Abstract: Silanes are produced by the disproportionation and/or redistribution reaction of chlorosilanes using a novel catalyst having a longer life and consisting of a quaternary phosphonium salt bonded to an organic macromolecule or polymer, represented by the following general formula: ##STR1## wherein .circle.P is an organic macromolecule or polymer, A is a bridging group between phosphorus and the organic macromolecule or polymer, R.sup.1, R.sup.2 and R.sup.3 are selected from the group consisting of hydrogen, C.sub.1 -C.sub.20 alkyl groups and aralkyl groups such as benzyl and phenethyl groups, which can contain oxygen or halogen atoms, and X is a halogen atom.Type: GrantFiled: September 19, 1986Date of Patent: February 16, 1988Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Mamoru Tachikawa, Kazutoshi Takatsuna, Kouji Shiozawa, Yoshiharu Okumura, Takeo Koyama
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Patent number: 4691070Abstract: A catalyst for the hydrogenation of a diolefin, having palladium or a compound thereof and at least one co-catalyst component selected from the group consisting of ruthenium, rhodium, cobalt, and rhenium supported each in the form of an elemental metal or a metal compound on a support, its method of preparation and its use for said hydrogenation, particularly for the hydrogenation of cyclopentadiene to cyclopentene is described herein.Type: GrantFiled: November 20, 1986Date of Patent: September 1, 1987Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Teiji Nakamura, Eiichiro Nishikawa, Takeo Koyama