Patents by Inventor Hideo Sawada
Hideo Sawada 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: 6694808Abstract: The operating efficiency of a compressor in the range of low Mach numbers at a supersonic wind tunnel test section (for which a considerable flow rate is required) is emphasized, and a design is provided in which pressure fluctuations can be reduced in a supersonic flow and also can be reduced in a supersonic wind tunnel circuit capable of operating at the required Mach number. Pressure fluctuations of flow brought about by inefficient operation can be reduced by operating an axial compressor 9 at a higher operating efficiency in the presence of a tunnel circuit resistor than the operating efficiency determined by the operating state theoretically calculated based on the Mach number required at a test section 19 in the absence of the tunnel circuit resistor. The Mach number at the test section can be made to conform to the required Mach number by causing the stream produced by the axial compressor 9 to pass through the tunnel circuit resistor such as a mesh plate 20 mounted in the tunnel circuit.Type: GrantFiled: August 22, 2002Date of Patent: February 24, 2004Assignee: National Aerospace Laboratory of JapanInventors: Hideo Sawada, Tetsuya Kunimasu
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Patent number: 6624536Abstract: An electronic apparatus is comprised of a circuit apparatus; and an electromagnetic wave absorbing device arranged in the vicinity of the circuit apparatus in an insulating manner with respect to a circuit of the circuit apparatus, and having a metal loop, a portion of which is made of a high resistor. The metal loop contains a first member having a resistor having a resistance value smaller than, or equal to several ohms; and a second member having a resistor having a resistance value larger than, or equal to several ohms, and connected so as to form an electric loop in combination with the first member.Type: GrantFiled: July 27, 1999Date of Patent: September 23, 2003Assignee: Hitachi, Ltd.Inventors: Hideo Sawada, Hiromu Ishihara, Hitoshi Yokota, Takashi Suga, Tsutomu Hara
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Patent number: 6614663Abstract: In a circuit board having a multilayer structure comprising a ground pattern and a power-supply pattern both, for example, by forming a plurality of slits along each side of the ground pattern or the power-supply pattern, a long thin conduction path connecting a corner and a side center of the ground pattern is formed and resistive elements are placed in the middles of the conduction path to short, circuit the corner and a side center of the ground pattern. Therefore, portions corresponding to an antinode and a node or antinode and an antinode of a standing wave are short-circuited. The standing wave is generated when electric power is supplied to ICs and LSIs mounted on the circuit board. Thus, noise sources caused by the standing wave cancel each other. As a result, the occurrence of an antiresonance phenomenon and an increase in impedance of the power supplying system caused by the standing wave can be suppressed.Type: GrantFiled: July 27, 1999Date of Patent: September 2, 2003Assignee: Hitachi, Ltd.Inventors: Hitoshi Yokota, Tsutomu Hara, Mariko Kasai, Takashi Suga, Hideo Sawada, Hiromu Ishihara
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Publication number: 20030056580Abstract: The operating efficiency of a compressor in the range of low Mach numbers at a supersonic wind tunnel test section (for which a considerable flow rate is required) is emphasized, and a design is provided in which pressure fluctuations can be reduced in a supersonic flow and also can be reduced in a supersonic wind tunnel circuit capable of operating at the required Mach number. Pressure fluctuations of flow brought about by inefficient operation can be reduced by operating an axial compressor 9 at a higher operating efficiency in the presence of a tunnel circuit resistor than the operating efficiency determined by the operating state theoretically calculated based on the Mach number required at a test section 19 in the absence of the tunnel circuit resistor. The Mach number at the test section can be made to conform to the required Mach number by causing the stream produced by the axial compressor 9 to pass through the tunnel circuit resistor such as a mesh plate 20 mounted in the tunnel circuit.Type: ApplicationFiled: August 22, 2002Publication date: March 27, 2003Applicant: NATIONAL AEROSPACE LABORATORY OF JAPANInventors: Hideo Sawada, Tetsuya Kunimasu
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Publication number: 20030001856Abstract: In an image displaying system, the distribution of functions among the image displaying apparatus, the information processing apparatus, and an operating system controlling the operations of the information processing apparatus are clarified, and the capability of the image displaying apparatus to display an image with a display attribute varying from area to area on the display screen of the image displaying apparatus is determined. The image displaying system includes an image displaying apparatus having such a capability, and an information processing apparatus that can generate an image signal and transmit the image signal to the image displaying apparatus. The system can communicate according to USB standards, or according to DDC standards. The information processing apparatus transmits area-attribute information for changing a display attribute of a specific area on the display screen to the image displaying apparatus.Type: ApplicationFiled: June 25, 2002Publication date: January 2, 2003Applicant: Hitachi, Ltd.Inventors: Hideo Sawada, Ikuya Arai, Nobuaki Kabuto, Koji Kito, Kazufumi Kikuchi, Kazunori Iwabuchi, Kenichi Saito
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Patent number: 6476821Abstract: In an image displaying system, the distribution of functions among the image displaying apparatus, the information processing apparatus, and an operating system controlling the operations of the information processing apparatus are clarified, and the capability of the image displaying apparatus to display an image with a display attribute varying from area to area on the display screen of the image displaying apparatus is determined. The image displaying system includes an image displaying apparatus having such a capability, and an information processing apparatus that can generate an image signal and transmit the image signal to the image displaying apparatus. The system can communicate according to USB standards, or according to DDC standards. The information processing apparatus transmits area-attribute information for changing a display attribute of a specific area on the display screen to the image displaying apparatus.Type: GrantFiled: January 30, 1998Date of Patent: November 5, 2002Assignee: Hitachi, Ltd.Inventors: Hideo Sawada, Ikuya Arai, Nobuaki Kabuto, Kouji Kitou, Kazufumi Kikuchi, Kazunori Iwabuchi, Kenichi Saitou
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Publication number: 20020000995Abstract: In an image displaying system, the distribution of functions among the image displaying apparatus, the information processing apparatus, and an operating system controlling the operations of the information processing apparatus are clarified, and the capability of the image displaying apparatus to display an image with a display attribute varying from area to area on the display screen of the image displaying apparatus is determined. The image displaying system includes an image displaying apparatus having such a capability, and an information processing apparatus that can generate an image signal and transmit the image signal to the image displaying apparatus. The system can communicate according to USB standards, or according to DDC standards. The information processing apparatus transmits area-attribute information for changing a display attribute of a specific area on the display screen to the image displaying apparatus.Type: ApplicationFiled: January 30, 1998Publication date: January 3, 2002Inventors: HIDEO SAWADA, IKUYA ARAI, NOBUAKI KABUTO, KOJI KITO, KAZUFUMI KIKUCHI, KAZUNORI IWABUCHI, KENICHI SAITO
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Patent number: 5414065Abstract: A polymer comprising fluoroalkyl group has a structure in which one or two parts of the fluoroalkyl group at the one or both ends of the molecule are linked to a part of alkylene groups or alkylene groups substituted with halogen, a part of alkylene group substituted with functional groups, such as halogen, cyano group, alkylsulfonic acid group, amidoalkylsulfonic acid group, carboxylic acid group, carboxyl group, oxycarbonyl group, ether group, epoxy group and the like, and/or a part of silicone group. A method of preparation of the polymer comprising fluoroalkyl group contains reaction of a fluoroalkanoyl peroxide with a monomer comprising the functional group or a monomer comprising silicone group. A surface active agent comprises fluoroalkyl group and caroxylic acid salt group. A surface treatment agent comprises the polymer comprising fluoroalkyl group, hydrolysis products thereof, hydrolytic condensation products thereof, and mixtures thereof.Type: GrantFiled: June 21, 1994Date of Patent: May 9, 1995Assignee: NOF CorporationInventors: Hideo Sawada, Keiji Komoto, Masahiro Sano, Yutaka Enokida, Mitani Motohiro, Takeo Matsumoto, Masaharu Nakayama, Masato Okajima
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Patent number: 5378589Abstract: A derivative of naphthalocyanine containing a perfluoroalkyl group and having a particular structure for ensuring excellent weather-proof properties, extremely high solubility in various solvents and capability of forming a film, and an optical recording medium prepared by using the derivative and capable of recording while using a focused beam of a semiconductor laser or the like. The derivative of naphthalocyanine containing a perfluoroalkyl group may be prepared by reacting a perfluoroalkanoyl peroxide having a particular structure with a naphthalocyanine.Type: GrantFiled: July 2, 1993Date of Patent: January 3, 1995Assignees: Nippon Oil and Fats Co., Ltd., Hitachi Chemical Co., Ltd.Inventors: Hideo Sawada, Motohiro Mitani, Masaharu Nakayama, Yoshii Morishita, Mitsuo Katayose, Tadashi Okamoto, Nobuyuki Hayashi
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Patent number: 5348890Abstract: Trioxane derivatives represented by the formula (I): ##STR1## wherein A and RA are the same with or different from each other, and represent a substituted or unsubstituted aliphatic hydrocarbon group, respectively, or represent R.sub.1 --X.sub.1 --or R.sub.2 --X.sub.2 --in which X.sub.1 and X.sub.2 represent independently a divalent organic residue, and R.sub.1 and R.sub.2 represent independently carboxyl group, amino group, hydroxyl group or mercapto group, and Z represents hydrogen atom, halogen atom, methyl group, ethyl group or propyl group, or carboxyl, amino, hydroxyl or mercapto group through a divalent organic residue, and process for the preparation thereof, as well as method for chemiluminescence comprising mixing the trioxane derivatives and a base.Type: GrantFiled: December 4, 1992Date of Patent: September 20, 1994Assignee: NOF CorporationInventors: Shuji Ichikawa, Motohiro Mitani, Yuko Yokoyama, Hideo Sawada, Takeo Matsumoto
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Patent number: 5338877Abstract: A fluoroalkyl group-containing organosilicon oligomer is represented by the following formula (I) or (IV) of: ##STR1## wherein R, R.sub.1, R.sub.2, X and Y each are the same or different groups and stand for an alkyl, alkoxy or alkylcarbonyloxy group having 1 to 10 carbon atoms, n represents an integer of 1 to 3, m.sub.1 and m.sub.3 represent an integer of 1 to 10, m.sub.2 represents an integer of 0 to 10, m.sub.4 represents an integer of 1 to 5 and R.sub.F represents ##STR2## where A stands for a hydrogen atom, a fluorine atom or a chlorine atom, n.sub.1 represents an integer of 1 to 10 and n.sub.2 represents an integer of 0 to 8. A surface treating agent contains the oligomer defined by the formula (I) or (IV).Type: GrantFiled: August 24, 1993Date of Patent: August 16, 1994Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Hideo Sawada, Motohiro Mitani, Masaharu Nakayama, Takeo Matsumoto
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Patent number: 5324803Abstract: A polymer comprising fluoroalkyl group has a structure in which one or two parts of the fluoroalkyl group at the one or both ends of the molecule are linked to a part of alkylene groups or alkylene groups substituted with halogen, a part of alkylene group substituted with functional groups, such as halogen, cyano group, alkylsulfonic acid group, amidoalkylsulfonic acid group, carboxylic acid group, carboxyl group, oxycarbonyl group, ether group, epoxy group and the like, and/or a part of silicone group. A method of preparation of the polymer comprising fluoroalkyl group contains reaction of a fluoroalkanoyl peroxide with a monomer comprising the functional group or a monomer comprising silicone group. A surface active agent comprises fluoroalkyl group and caroxylic acid salt group. A surface treatment agent comprises the polymer comprising fluoroalkyl group, hydrolysis products thereof, hydrolytic condensation products thereof, and mixtures thereof.Type: GrantFiled: October 13, 1992Date of Patent: June 28, 1994Assignee: NOF CorporationInventors: Hideo Sawada, Keiji Komoto, Masahiro Sano, Yutaka Enokida, Motohiro Mitani, Takeo Matsumoto, Masaharu Nakayama, Masato Okajima
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Patent number: 5288891Abstract: A fluoroalkyl group-containing organosilicon oligomer is represented by the following formula (I) or (IV) of: ##STR1## wherein R, R.sub.1, R.sub.2, X and Y each are the same or different groups and stand for an alkyl, alkoxy or alkylcarbonyloxy group having 1 to 10 carbon atoms, n represents an integer of 1 to 3, m.sub.1 and m.sub.3 represent an integer of 1 to 10, m.sub.2 represents an integer of 0 to 10, m.sub.4 represents an integer of 1 to 5 and R.sub.F represents --CF.sub.2).sub.n.sbsb.1 A or ##STR2## where A stands for a hydrogen atom, a fluorine atom or a chlorine atom, n.sub.1 represents an integer of 1 to 10 and n.sub.2 represents an integer of 0 to 8. A surface treating agent contains the oligomer defined by the formula (I) or (IV).Type: GrantFiled: November 14, 1991Date of Patent: February 22, 1994Assignee: Nippon Oil and Fats Co. Ltd.Inventors: Hideo Sawada, Motohiro Mitani, Masaharu Nakayama, Takeo Matsumoto
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Patent number: 5260435Abstract: A derivative of naphthalocyanine containing a perfluoroalkyl group and having a particular structure for ensuring excellent weather-proof properties, extremely high solubility in various solvents and capability of forming a film, and an optical recording medium prepared by using the derivative and capable of recording while using a focused beam of a semiconductor laser or the like. The derivative of naphthalocyanine containing a perfluoroalkyl group may be prepared by reacting a perfluoroalkanoyl peroxide having a particular structure with a naphthalocyanine.Type: GrantFiled: March 18, 1992Date of Patent: November 9, 1993Assignees: Nippon Oil and Fats Co., Ltd., Hitachi Chemical Co., Ltd.Inventors: Hideo Sawada, Motohiro Mitani, Masaharu Nakayama, Yoshii Morishita, Mitsuo Katayose, Tadashi Okamoto, Nobuyuki Hayashi
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Patent number: 5247062Abstract: A hetero-aromatic polymer containing a fluoroalkyl group is a novel polymer and has a polymerization degree of 5 to 5000, the polymer including the following structural unit represented by the general formula (I) of: ##STR1## (wherein R stands for a hydrogen atom or an alkyl group having 1 to 25 carbon atoms, X stands for a sulfur atom, an imino or an oxygen atom, and n is an integer of from 1 to 9.Type: GrantFiled: May 13, 1992Date of Patent: September 21, 1993Assignee: Nippon Oil and Fats Cp., Ltd.Inventors: Hideo Sawada, Masaharu Nakayama
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Patent number: 5118879Abstract: Fluoroalkyl derivatives which are novel compounds represented by the following general formula (I) or (II) of: ##STR1## orR.sub.1 --CH.dbd.CR.sub.2 (CF.sub.2).sub.n F (II)(wherein R.sub.1 stands for ##STR2## (where X stands for a hydrogen atom, a chlorine atom, a bromine atom, a fluorine atom, an iodine atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group or a nitro group), an aroyloxy group, or an alkyl or alkoxycarbonyl group having 1 to 20 carbon atoms, and R.sub.2 stands for a hydrogen atom or a methyl group; and n stands for an integer of from 1 to 20.) A process for the preparation of the derivative is a process comprising reacting an olefin compound and a fluoroalkanesulfonyl chloride in the presence of a metal catalyst, or a process comprising an additional alkali treatment step which follows the aforementioned process.Type: GrantFiled: October 25, 1990Date of Patent: June 2, 1992Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Nobumasa Kamigata, Masato Yoshida, Hideo Sawada, Masaharu Nakayama
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Patent number: 5068454Abstract: A polyfluoroalkanoyl peroxide has the formula (I) ##STR1## wherein n.sub.1 and n.sub.2 each represent an integer of 0 to 8 and n.sub.1 plus n.sub.2 is 1 or larger.Type: GrantFiled: June 15, 1990Date of Patent: November 26, 1991Assignee: Nippon Oil & Fats Co., Ltd.Inventors: Hideo Sawada, Masaharu Nakayama
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Patent number: 4956123Abstract: Fluorine-containing aromatic derivatives are produced by the reaction of di(haloacyl)peroxide represented by the general formula: ##STR1## (wherein X stands for a fluorine, chlorine, or hydrogen atom and n for an integer of the value of 1 to 10) with aromatic unsaturated monomers represented by the general formula: ##STR2## (wherein Y stands for hydrogen atom, methyl, ethyl, propyl, acetyl, propionyl, acetyloxy, propionyloxy, methoxy, ethoxy, propoxy, vinyl, isopropenyl, or nitro group, or a halogen atom, R.sup.1 for hydrogen atom, methyl, ethyl, propyl, or butyl group, R.sup.2 for hydrogen atom, methyl or phenyl group, and m for an integer of the value of 1 to 5).Type: GrantFiled: September 14, 1988Date of Patent: September 11, 1990Assignee: Nippon Oils & Fats Company, Ltd.Inventors: Hideo Sawada, Michio Kobayashi, Masato Yoshida
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Patent number: 4641277Abstract: A system for detecting access to a storage in a data processing apparatus which includes an address translation look-aside buffer which holds a part of an address translation table listing correspondences between logical addresses and real addresses, entry of the translation look-aside buffer being referred to upon every access to the storage. Each of the entries is added with information bit indicating whether a storage region corresponding to a given entry includes an area which is allocated for the detection of the access to the storage. Detection as to whether an address for accessing the storage is located within the area allocated for the access detection is not carried out when the identification information indicates that the storage region to be accessed does not include the area allocated for the access detection.Type: GrantFiled: November 9, 1983Date of Patent: February 3, 1987Assignee: Hitachi, Ltd.Inventors: Kiyoshi Yata, Hideo Sawada
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Patent number: D399775Type: GrantFiled: October 1, 1997Date of Patent: October 20, 1998Assignee: Yamatake-Honeywell Co., Ltd.Inventors: Fumikazu Masuda, Shunichiro Awa, Isamu Ikeda, Yoshihito Omura, Koichi Kondo, Hideo Sawada