Patents by Inventor Hideaki Murakami
Hideaki Murakami 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: 6777991Abstract: A phase-locked loop apparatus includes a ring oscillator including inverters, first and second transistors, a converter, mirror circuits. The first transistors control a current from a first voltage to the inverters. The second transistors control a current from the inverters. The converter converts the voltage output from the filter into a current. The first mirror circuit outputs a current in accordance with the current output from the converters. The second mirror circuit outputs a current according to the current output from the first mirror circuit to control the first transistors. The third mirror circuit outputs a current according to the current output from the second mirror circuit to control the second transistors. The converter, the first and second mirror circuits operate with a second voltage greater than the first voltage, and the ring oscillator and the third mirror circuit operate with the first voltage.Type: GrantFiled: October 9, 2003Date of Patent: August 17, 2004Assignee: Ricoh Company, Ltd.Inventor: Hideaki Murakami
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Publication number: 20040129515Abstract: A cushioning body is made by molding a mixture of shock absorbing gel (heat resistant elastic member) made of polyurethane resin and ferrite particles (electromagnetic wave blocking members) into a box. Since the shock absorbing gel is in a form of gel, it does not have fluidity but has stability in shape, and further has not only shock absorbing ability but also heat resistance and heat radiation ability deriving from thermal conductivity. The ferrite particles are locally distributed on a main board side of a bottom portion of the cushioning body and have an electromagnetic wave blocking ability by absorbing or reflecting the electromagnetic wave to prevent transmittance of the electromagnetic wave.Type: ApplicationFiled: November 3, 2003Publication date: July 8, 2004Inventor: Hideaki Murakami
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Publication number: 20040080342Abstract: A phase-locked loop apparatus includes a ring oscillator including inverters, first and second transistors, a converter, mirror circuits. The first transistors control a current from a first voltage to the inverters. The second transistors control a current from the inverters. The converter converts the voltage output from the filter into a current. The first mirror circuit outputs a current in accordance with the current output from the converters. The second mirror circuit outputs a current according to the current output from the first mirror circuit to control the first transistors. The third mirror circuit outputs a current according to the current output from the second mirror circuit to control the second transistors. The converter, the first and second mirror circuits operate with a second voltage greater than the first voltage, and the ring oscillator and the third mirror circuit operate with the first voltage.Type: ApplicationFiled: October 9, 2003Publication date: April 29, 2004Inventor: Hideaki Murakami
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Patent number: 6664861Abstract: A phase-locked loop apparatus includes a ring oscillator including inverters, first and second transistors, a converter, mirror circuits. The first transistors control a current from a first voltage to the inverters. The second transistors control a current from the inverters. The converter converts the voltage output from the filter into a current. The first mirror circuit outputs a current in accordance with the current output from the converters. The second mirror circuit outputs a current according to the current output from the first mirror circuit to control the first transistors. The third mirror circuit outputs a current according to the current output from the second mirror circuit to control the second transistors. The converter, the first and second mirror circuits operate with a second voltage greater than the first voltage, and the ring oscillator and the third mirror circuit operate with the first voltage.Type: GrantFiled: August 28, 2002Date of Patent: December 16, 2003Assignee: Ricoh Company, Ltd.Inventor: Hideaki Murakami
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Publication number: 20030188277Abstract: First, circuit simulation programs are executed based on electric information of a schematic of a semiconductor integrated circuit. Then, LVS (layout versus schematic) programs are executed using the electric information of the schematic and physical layout information corresponding to the schematic. The semiconductor integrated circuit is therefore evaluated by processing circuit design value information obtained from the circuit simulation programs and layout information obtained by execution of the LVS programs.Type: ApplicationFiled: October 21, 2002Publication date: October 2, 2003Inventor: Hideaki Murakami
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Publication number: 20030126568Abstract: A system for analyzing a monolithic integrated circuit includes a logic circuit simulator configured to obtain a cell duty of a primitive cell configuring a logic circuit by performing a logic simulation of the logic circuit based on a netlist of the logic circuit and input vectors for the logic circuit, an analog circuit simulator configured to obtain a transistor duty of a transistor that configures a primitive cell by performing an analog simulation of the primitive cell based on a netlist of the analog circuit of the primitive cell and input vectors for the primitive cell, and a synthesis module configured to obtain a synthesized duty of a transistor of the logic circuit by performing a synthesis of the cell and transistor duties.Type: ApplicationFiled: September 30, 2002Publication date: July 3, 2003Applicant: Kabushiki Kaisha ToshibaInventor: Hideaki Murakami
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Publication number: 20030076180Abstract: A phase-locked loop apparatus includes a ring oscillator including inverters, first and second transistors, a converter, mirror circuits. The first transistors control a current from a first voltage to the inverters. The second transistors control a current from the inverters. The converter converts the voltage output from the filter into a current. The first mirror circuit outputs a current in accordance with the current output from the converters. The second mirror circuit outputs a current according to the current output from the first mirror circuit to control the first transistors. The third mirror circuit outputs a current according to the current output from the second mirror circuit to control the second transistors. The converter, the first and second mirror circuits operate with a second voltage greater than the first voltage, and the ring oscillator and the third mirror circuit operate with the first voltage.Type: ApplicationFiled: August 28, 2002Publication date: April 24, 2003Applicant: Ricoh Company, LtdInventor: Hideaki Murakami
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Patent number: 6459991Abstract: The present invention provides a collision in right/left turn prevention system which can automatically stop a vehicle even when a driver of the vehicle can not correctly grasp a course of a vehicle running in the counter direction because of the road line form or because the counter vehicle is hid behind other vehicles, or when a velocity of the counter vehicle is faster than that estimated by the driver.Type: GrantFiled: October 20, 2000Date of Patent: October 1, 2002Assignee: Public Works Research Institute, Ministry of ConstructionInventors: Akihiko Takiguchi, Koji Kubota, Naoya Noguchi, Satoshi Moteki, Harutada Ooya, Hideaki Murakami, Masaya Yamada, Hiroshi Takahashi, Akira Kuno, Hisashi Ezure, Tetsuaki Kondo, Ryoji Matsubara, Yasuyuki Ohira, Kenichi Ohtani, Hiroshi Mashimo, Takao Inobe, Kazumasa Miyamoto, Kazutaka Kawahara
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Patent number: 6360171Abstract: A system-enabled vehicle entering a crossing warns a driver of the vehicle that a possibility of bumping exists, thereby allowing the driver to brake and stop the vehicle in an emergency in front of the crossing. When the system determines a possibility of bumping with another vehicle entering the crossing exists, the system continuously provides controls for decelerating and stopping the vehicle in a range from a point where the system can decelerate the vehicle in an emergency with time allowance for stopping the vehicle in front of the crossing up to a point in front of the crossing.Type: GrantFiled: October 20, 2000Date of Patent: March 19, 2002Assignee: Public Works Research Institute, Ministry of ConstructionInventors: Kazumasa Miyamoto, Naoya Noguchi, Satoshi Moteki, Harutada Ooya, Hideaki Murakami, Masaya Yamada, Hiroshi Takahashi, Akihiko Takiguchi, Koji Kubota, Akira Kuno, Hisashi Ezure, Tetsuaki Kondo, Ryoji Matsubara, Yasuyuki Ohira, Kenichi Ohtani, Hiroshi Mashimo, Takao Inobe, Kazutaka Kawahara
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Patent number: 6337637Abstract: The collision with pedestrian prevention system according to the present invention comprises pedestrian detection means, road surface conditions detection means, road information accumulation means, vehicle position detection means, vehicle state detection means, processing means, information output means, and vehicle control means. Because of the configuration, the driver is alerted the presence of any pedestrian on a pedestrian's crossing and can immediately correct operations for handling the vehicle without being perplexed by the information just about to finish crossing the road. This system works only when there is the possibility of collision between a pedestrian on a pedestrian's crossing and a vehicle, and provides automatic controls for decelerating or stopping the vehicle when the driver can stop the vehicle by emergently braking over a distance from the vehicle to the pedestrian's crossing.Type: GrantFiled: October 20, 2000Date of Patent: January 8, 2002Assignee: Public Works Research Institute, Ministry of ConstructionInventors: Koji Kubota, Naoya Noguchi, Satoshi Moteki, Harutada Ooya, Hideaki Murakami, Masaya Yamada, Hiroshi Takahashi, Akihiko Takiguchi, Akira Kuno, Hisashi Ezure, Tetsuaki Kondo, Ryoji Matsubara, Yasuyuki Ohira, Kenichi Ohtani, Hiroshi Mashimo, Takao Inobe, Kazumasa Miyamoto, Kazutaka Kawahara
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Patent number: 5049367Abstract: An aluminum nitride powder obtained by firing and reacting a mixture of alumina and carbon in a nitrogen-containing atmosphere is disclosed, the aluminum nitride powder having an oxygen content of not more than 2.0% by weight, an iron content of not more than 20 ppm, a silicon content of not more than 100 ppm, and a titanium content of not more than 20 ppm and having has a tapped density of at least 1.0 g/cm.sup.3. An aluminum nitride powder containing from 0.01% to 10% by weight of a sintering aid is also disclosed, the aluminum nitride powder having an oleophilic surface and having a tapped density of at least 1.0 g/cm.sup.3. The aluminum nitride powder of the present invention has excellent moldability, has a high tapped density, is less in formation of coagulated particles, and has a sharp particle size distribution.Type: GrantFiled: October 4, 1989Date of Patent: September 17, 1991Assignee: Sumitomo Chemical Co., LimitedInventors: Kazuhiko Nakano, Mitsutoshi Murase, Norio Matsuda, Hideaki Murakami
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Patent number: 4986967Abstract: In a furnace which allows a feed powder or granules in a stack of trays on a base plate to be reacted with a reactive gas, the improvement wherein each of the trays has a cutout or an opening providing a passage for the reactive gas or the produced gas both at the top of one side wall and in the bottom wall to the opposite side of the tray, the base plate having an opening through which the reactive gas is introduced or the produced gas is discharged.Type: GrantFiled: March 3, 1988Date of Patent: January 22, 1991Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuhiko Nakano, Norio Matsuda, Mitsutoshi Murase, Hideaki Murakami
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Patent number: 4740423Abstract: When an abrasive having an oleophilic surface used in a magnetic recording medium obtained by subjecting an inorganic powder having a Mohs hardness of 5 or above and an average particle size of 2 .mu.m across or below to a dry contact treatment with a dispersing agent having an oleophilic group under grinding conditions giving an impact value of 1G or greater is used in combination with a magnetic powder as a magnetic recording layer of magnetic recording medium, the wear at a magnetic head can be prevented and still characteristics can be improved.Type: GrantFiled: February 4, 1986Date of Patent: April 26, 1988Assignee: Sumitomo Chemical Company, LimitedInventors: Hidekimi Kadokura, Hiroshi Umezaki, Hideaki Murakami
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Patent number: 4704266Abstract: A method for producing .gamma.-form lithium aluminate powders usable as a material for an electrolyte tile of molten carbonate fuel cells which comprises mixing aluminum alkoxide with one member selected from the group consisting of the lithium salts of inorganic and organic acids, lithium hydroxide and lithium oxide in the presence of a non-aqueous solvent, carrying out reaction with addition of water of 1.5 to 20 moles (including water of crystallization contained in the lithium compound) based on 1 mole of aluminum alkoxide with stirring, and removing the solvent to obtain a solid matter which is then calcined at a temperature in a range of from 650.degree. C. to 1000.degree. C.Type: GrantFiled: June 11, 1986Date of Patent: November 3, 1987Assignee: Sumitomo Chemical Company, LimitedInventors: Hidekimi Kadokura, Hiroshi Umezaki, Hideaki Murakami, Toshiyuki Mizoe
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Patent number: 4671993Abstract: A magnetic recording medium comprising a substrate and a magnetic layer formed on the substrate and comprising an inorganic powder having an average primary particle size of 0.35 .mu.m or less, an angle of repose of 40.degree. or more and a Mors hardness of 5 or more as a reinforcing material, and a magnetic powder, is excellent in wear resistance and durability of the magnetic layer and improves wear and injury of a magnetic head.Type: GrantFiled: October 21, 1985Date of Patent: June 9, 1987Assignee: Sumitomo Chemical Company, LimitedInventors: Hidekimi Kadokura, Hiroshi Umezaki, Hideaki Murakami
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Patent number: 4584243Abstract: When an abrasive having an oleophilic surface used in a magnetic recording medium obtained by subjecting an inorganic powder having a Mohs hardness of 5 or above and an average particle size of 2 .mu.m across or below to a dry contact treatment with a dispersing agent having an oleophilic group under grinding conditions giving an impact value of 1 G or greater is used in combination with a magnetic powder as a magnetic recording layer of magnetic recording medium, the wear at a magnetic head can be prevented and still characteristics can be improved.Type: GrantFiled: October 25, 1983Date of Patent: April 22, 1986Assignee: Sumitomo Chemical Company, LimitedInventors: Hidekimi Kadokura, Hiroshi Umezaki, Hideaki Murakami
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Patent number: 4429483Abstract: An automatic rat killing device includes a box having an opening at its top and a stairway leading to its top. A pair of closure plates are pivotally mounted at their one ends on the box for movement between horizontal positions where the two closure plates are mated together at their other ends to close the opening and vertical positions where the closure plates are separated apart to open the opening. A solenoid is mounted on the box and has a stop lever normally engaged with the closure plates to hold them in their horizontal positions. A container holding a viscous liquid is removably accommodated within the box. A detector generates a detecting signal when a rat touches a bait. The solenoid is energized to move the stop lever out of engagement with the closure member so that the closure plates are moved to their vertical positions, thereby causing the rat to fall into the viscous liquid.Type: GrantFiled: March 17, 1982Date of Patent: February 7, 1984Inventor: Hideaki Murakami