Patents by Inventor Michihiro Murata
Michihiro Murata 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: 4746557Abstract: An LC composite component employing a ceramic sintered body obtained by laminating pluralities of magnetic green sheets and dielectric green sheets and cofiring the same. The ceramic sintered body is provided therein with a magnetic region and a dielectric region along the direction of thickness. The magnetic region of the sintered body is provided with at least one inner electrode layer which extends to first opposite side surfaces of the sintered body, thereby to define an inductance unit. The dielectric region is provided with a plurality of electrodes oppositely arranged through the dielectric substance, which plurality of electrodes includes first and second electrodes. A pair of first outer electrodes are formed on the first side surfaces of the sintered body, to be electrically connected with the inner electrode formed in the magnetic region.Type: GrantFiled: December 8, 1986Date of Patent: May 24, 1988Assignee: Murata Manufacturing Co., Ltd.Inventors: Yukio Sakamoto, Takeshi Tanabe, Yasuo Fujiki, Hiromichi Sakai, Kunisaburo Tomono, Michihiro Murata, Harufumi Mandai, Yasuyuki Naito, Hidemichi Mori
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Patent number: 4745284Abstract: A pyroelectric infrared ray detector of the so-called dual structure for detecting an intruder or the like through differential output of two pyroelectric infrared ray detecting elements connected in parallel or series to each other. The infrared ray detector comprises a pair of pyroelectric infrared ray detecting elements having substantially identically directed light receiving surfaces and electrically connected to each other and a shield member arranged in front of the said light receiving surfaces to partially shield the infrared ray detecting elements against incidence of infrared light. The shield member is arranged in a plane extending between the infrared ray detecting elements to separate the same on both sides thereof.Type: GrantFiled: May 27, 1986Date of Patent: May 17, 1988Assignee: Murata Manufacturing Co., Ltd.Inventors: Noboru Masuda, Kenji Tomaki, Tetsuo Oosawa, Michihiro Murata
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Patent number: 4724393Abstract: A surface potential detector of a non-contact type which comprises first and second detecting electrodes arranged in a separated manner from a measured surface so that charge variations are induced on the first and second detecting electrodes on the basis of the potential of the measured surface. The surface potential detector further comprises apparatus for making the amounts of charge variations induced on the first and second detecting electrodes different from each other, first and second detecting devices respectively detecting the amounts of charge variations induced on the first and second detecting electrodes and correction apparatus for performing arithmetic on the ratio between the outputs from the first and second detecting devices to correct the output of the first or second detecting devices on the basis of the ratio.Type: GrantFiled: November 10, 1986Date of Patent: February 9, 1988Assignee: Murata Manufacturing Co., Ltd.Inventors: Akira Kumada, Michihiro Murata
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Patent number: 4717595Abstract: A molded carbonaceous material which is a molded mixture comprising a carbonaceous powder and a binder, particles of said carbonaceous powder particles being bound together by means of said binder with the surface of said carbonaceous powder being not wholly covered with said binder.Type: GrantFiled: November 17, 1986Date of Patent: January 5, 1988Assignee: Murata Manufacturing Co., Ltd.Inventors: Koichi Watanabe, Michinobu Maesaka, Michihiro Murata
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Patent number: 4692619Abstract: A pyroelectric type detecting device including a converging mirror, a pyroelectric type sensor element for detecting light converged by the converging mirror, an amplifier for amplifying an output signal of the sensor element and a casing for accommodating the sensor element and the amplifier. The sensor element has a window for receiving the light and the casing is rotatably mounted on a portion of the converging mirror such that the window of the sensor element confronts a mirror member of the converging mirror.Type: GrantFiled: June 19, 1986Date of Patent: September 8, 1987Assignee: Murata Manufacturing Co., Ltd.Inventors: Noboru Masuda, Kenji Tomaki, Tetsuo Oosawa, Michihiro Murata
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Patent number: 4691104Abstract: A one-dimensional pyroelectric sensor array comprises (1) a base plate made of a pyroelectric material; a plurality of strip elements made of pyroelectric material having a heat-sensitive region at a free end thereof, each supported only at the other end to the base plate to form an integrated structure with the base plate; and (2) one pair of detecting electrodes formed on the heat-sensitive region of the free end of each strip element.Type: GrantFiled: June 12, 1985Date of Patent: September 1, 1987Assignee: Murata Manufacturing Co., Ltd.Inventors: Michihiro Murata, Katsuhiko Tanaka, Hiroyuki Seto
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Patent number: 4683639Abstract: A method of manufacturing an electrolytic double-layer capacitor comprises steps of forming a laminated intermediate member in which an insulating gasket defines a central space containing a carbonaceous compact having a recess portion; and the insulating gasket is interposed between a separator, having a region provided with no liquid column of an electrolytic solution in a position corresponding to the recess portion, and a conductive sheet; and dripping the electrolytic solution from above the above mentioned region of the separator and then deforming the conductive sheet by negative pressure so as to cause the electrolytic solution to impregnate the compact.Type: GrantFiled: May 7, 1986Date of Patent: August 4, 1987Assignee: Murata Manufacturing Co., Ltd.Inventors: Michinobu Maesaka, Koichi Watanabe, Michihiro Murata
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Patent number: 4616290Abstract: An electric double layer capacitor includes an insulative gasket for receiving a plurality of double layer capacitive elements. A common electrode is provided on each end of the gasket to connect the capacitive elements all in series, all in parallel, or in some combination of serial and parallel.Type: GrantFiled: April 18, 1984Date of Patent: October 7, 1986Assignee: Murata Manufacturing Co., Ltd.Inventors: Koichi Watanabe, Michihiro Murata
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Patent number: 4594758Abstract: A method of making a double layer capacitor that is not susceptible to short-circuits due to smearing of conductive material along the edges during cutting. The device is formed with the bonding agent between an outer conductive member and an inner resilient insulator in a semi-hardened state. After initial fabrication and cutting, the device is compressed and the bonding agent completely hardened while the device is under compression. Release of the pressure sets up shear stresses that fracture any conductive material bridging the resilient insulating members and creates step portions at the exterior interface of the conductive material and the resilient insulator.Type: GrantFiled: June 20, 1984Date of Patent: June 17, 1986Assignee: Murata Manufacturing Co., Ltd.Inventors: Kohichi Watanabe, Michihiro Murata
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Patent number: 4595515Abstract: A vibration-isolating article is composed of a composite material comprising a powdered piezoelectric material and a high polymer, said composite material having electrical leakage paths. The electrical leakage paths may be formed by an electrically conductive powdered material incorporated into the composite material, or the powdered piezoelectric material per se, or a matrix of the high polymer.Type: GrantFiled: August 28, 1984Date of Patent: June 17, 1986Assignee: Murata Manufacturing Co., Ltd.Inventors: Kikuo Wakino, Michihiro Murata, Shunjiro Imagawa
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Patent number: 4570482Abstract: A load-sensitive level detecting device for detecting the level of a powder or liquid comprises a piezoelectric vibrator (3), a case (1) which separates the object whose level is to be detected from the latter, the case (1) being formed with an opening (1b), which is closed by an elastic sheet (2) serving as a movable detecting section, whereby when the load exerted by the object is applied to the elastic sheet (2), the vibration of the piezoelectric vibrator (3) is constrained.Type: GrantFiled: April 19, 1983Date of Patent: February 18, 1986Assignee: Murata Manufacturing Co., Ltd.Inventors: Michihiro Murata, Akira Kumada
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Patent number: 4562045Abstract: A carrier which is used when a solution, as an analytical sample, is analyzed by X-ray fluorometry. The carrier comprises a medium having a central region with a plurality of alternate slits and support connections, each support connection defined between adjacent slits. The configuration defines an island-like portion contrasted with the surrounding region and serving to hold the analytical solution, with the presence of the slits preventing the analytical solution from permeating into the surrounding region. The island-like portion is formed with a plurality of fine through holes.Type: GrantFiled: February 24, 1983Date of Patent: December 31, 1985Assignee: Murata Manufacturing Co.Inventor: Michihiro Murata
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Patent number: 4522060Abstract: A dry/dew/frost sensor comprising a plurality of sensor units, each sensor unit comprising a ceramic substrate (1, 2) whose permittivity is lower than ice and a pair of electrodes (3, 4; 5, 6) being arranged on the ceramic substrate in contact therewith, wherein adjacent sensor units are arranged so as to face each other at a predetermined distance so that the pair of electrodes (3, 4; 5, 6) may be opposed to each other, and the impedance between the pair of electrodes on each of the sensor unit varying with changes in three states, dry, bedewed, and frosted states.Type: GrantFiled: March 21, 1983Date of Patent: June 11, 1985Assignee: Murata Manufacturing Co., Ltd.Inventors: Michihiro Murata, Shoichi Kitao
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Patent number: 4523142Abstract: An apparatus for sensing dew and frost, comprising a sensing portion which includes a substrate (1) having less permittivity than ice and includes a pair of electrodes (2, 3) arranged to touch the substrate (1) and further includes a resistive film (4) on the substrate (1) covering the pair of electrodes (2, 3), the impedance between the pair of electrodes (2, 3) changing in three states, or dry, bedewed and frosted states.Type: GrantFiled: September 27, 1982Date of Patent: June 11, 1985Assignee: Murata Manufacturing Co., Ltd.Inventors: Michihiro Murata, Akira Kumada
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Patent number: 4497701Abstract: A humidity sensitive device, including opposing electrodes formed on an insulating substrate, and a humidity sensitive film formed on the surface of the insulating substrate and at least between the opposing electrodes. The humidity sensitive film is obtained by coating on the surface of the insulating substrate a mixture including a conductive or semiconductive powder, a solid electrolyte powder and an organic polymer cross-linked by a zirconium compound and heating the same.Type: GrantFiled: February 22, 1983Date of Patent: February 5, 1985Assignee: Murata Manufacturing Co., Ltd.Inventors: Michihiro Murata, Akira Kumada
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Patent number: 4450429Abstract: A humidity sensitive resistance device, including opposing electrodes (102, 103) formed on an insulating substrate (101), and a humidity sensitive resistance film (104) formed on the surface of the insulating substrate (101) and at least between the opposing electrodes (102, 103). The resistivity of the humidity sensitive resistance film (104) increases with an increase of an ambient relative humidity. The humidity sensitive resistance film (104) comprises a hydrophilic polymer and a conductive powder, and has a zirconium compound unevenly distributed on the side of surface thereof. The surface of the humidity sensitive resistance film (104) is dehydrated by contact with an alkaline solution or by heating.Type: GrantFiled: October 26, 1982Date of Patent: May 22, 1984Assignee: Murata Manufacturing Co., Ltd.Inventor: Michihiro Murata
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Patent number: 4442422Abstract: A humidity sensitive resistor, comprising a pair of detecting electrodes (2) and (3) formed on an insulating substrate (1), and a humidity sensitive film (4) formed to coat on this detecting electrodes, the humidity sensitive film (4) being made of an integrated structure of a first layer macromolecular resin film (5) containing a polyvinyl alcohol polymer and an electrolyte and a second layer of hygroscopic macromolecular resin film (6) covering on the surface of the first layer, and humidity being detected with the aid of a change of the resistance value of this humidity sensitive film (4).Type: GrantFiled: March 21, 1983Date of Patent: April 10, 1984Assignee: Murata Manufacturing Co., Ltd.Inventors: Michihiro Murata, Shoichi Kitao, Shinsei Okabe
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Patent number: 4433320Abstract: A dew sensor comprising a substrate (1), a pair of detecting electrodes (2, 3) and a plurality of humidity sensitive members (4), the plurality of humidity sensitive members (4) connecting said opposing detecting electrodes (2, 3) on the substrate (1) and thus the detecting electrodes (2, 3) being at least in part exposed or uncovered.Type: GrantFiled: August 18, 1982Date of Patent: February 21, 1984Assignee: Murata Manufacturing Co., Ltd.Inventors: Michihiro Murata, Akira Kumada
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Patent number: 4405560Abstract: A carrier which is used when a solution, as an analytical sample, is analyzed by X-ray fluorometry. The carrier is formed in its central region with a plurality of alternate slits and support connections, support connection each defined between adjacent slits. The configuration defines an island-like portion contrasted with the surrounding region and serving to hold the analytical solution, with the presence of the slits preventing the analytical solution from permeating into the surrounding region. The island-like portion is formed with a plurality of preformed fine holes.Type: GrantFiled: October 7, 1981Date of Patent: September 20, 1983Assignee: Murata Manufacturing Co., Ltd.Inventor: Michihiro Murata
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Patent number: 4357426Abstract: A humidity sensitive ceramics comprises a sintered body consisting essentially of a semiconductive compound oxide with a perovskite structure and a compound oxide, said semiconductive compound oxide having a composition expressed by the general formula (I):A.sub.1-x A'.sub.x BO.sub.3-.delta.. . . (I)wherein A is at least one element selected from the group consisting of rare earth elements with atomic numbers 57 to 71, yttrium and hafnium, A' is at least one element selected from the group consisting of alkaline-earth metals, B is at least one element selected from the group consisting of transition elements with atomic numbers 23 to 30, x is a mole fraction and takes a value of the following range, 0.ltoreq.x.ltoreq.1, and .delta. is a non-stoichiometric parameter, said compound oxide having a composition expressed by the general formula (II):AMO.sub.3 . . .Type: GrantFiled: December 17, 1981Date of Patent: November 2, 1982Assignee: Murata Manufacturing Co., Ltd.Inventors: Michihiro Murata, Shinsei Okabe