Patents by Inventor Yasuo Maruyama
Yasuo Maruyama 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: 5740222Abstract: A radiation computed tomography apparatus of this invention includes a couch, a top board which carries the patient and is slidably arranged on the couch, a gantry which has an opening and acquires projection data of a patient by guiding the patient carried on the top board into the opening, reconstruction section for reconstructing the tomographic image of the patient by reconstructing the projection data acquired by the gantry, and adjusting section, arranged on or near the gantry, for adjusting the photographing condition of the patient for obtaining a predetermined tomographic image of the patient.Type: GrantFiled: February 24, 1997Date of Patent: April 14, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Hidehiro Fujita, Masatoshi Tomura, Hisashi Tachizaki, Hideki Fujimoto, Manabu Hiraoka, Masaharu Tsuyuki, Naoko Hasegawa, Tomoyasu Komori, Makoto Suzuki, Hiroshi Hori, Yasuo Maruyama
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Patent number: 5719429Abstract: An insulated gate semiconductor device, which improves high frequency characteristics by reducing the resistance of a path from a gate bonding portion to each gate and eliminating an unbalance in resistances of respective gates, and which obtain a higher output by eliminating a limitation in current capacity due to the thickness of a first metal layer. In this insulated gate semiconductor device, a first aluminum layer is connected in parallel onto a gate electrode made of polycrystalline silicon. The adjacent gates, each having such a double layer structure, extend outside channel regions and are connected to each other. A lead-out electrode of a second aluminum layer is connected to the center of the connection portion of the adjacent gates through an opening portion. A gate bonding portion is provided at the center of the lead-out electrode. Each of source and drain electrodes is also of a double layer structure having the first aluminum layer and the second aluminum layer.Type: GrantFiled: December 27, 1995Date of Patent: February 17, 1998Assignee: Hitachi, Ltd.Inventors: Isao Yoshida, Mineo Katsueda, Yasuo Maruyama
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Patent number: 5703941Abstract: A switching center 30 comprises a memory part M2, a memory part M3, and a memory part M4. The memory part M2 stores a terminating terminal number corresponding to and registered by each subscriber. The memory part M3 stores idle/busy information corresponding to each terminal. The memory part M4 stores idle/busy information corresponding to each subscriber. When a subscriber 11.sub.1 makes a call at a terminal 12.sub.2, the switching center 30 determines whether the idle/busy information for the subscriber 11.sub.1 stored in the memory part M4 is idle or busy. When the idle/memory information represents idle, the switching center 30 refers to the idle/busy information for the terminal 12.sub.2 stored in the memory part M3. When this idle/busy information represents idle, the switching center 30 reads out the terminal number of a terminating terminal of a terminating subscriber stored in the terminating terminal memory part M2 and performs an outgoing call connection process.Type: GrantFiled: March 14, 1996Date of Patent: December 30, 1997Assignee: NTT Mobile Communications Network, Inc.Inventors: Akihisa Nakajima, Masami Yabusaki, Shoichi Hirata, Kenichi Yamaguchi, Shiokazu Fujiwara, Yasuo Maruyama, Yasuyuki Uchiyama, Eriko Takemoto
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Patent number: 5649301Abstract: In a mobile communication network, a mobile unit location register ML and a subscriber location register SL are provided. In the mobile unit location register the mobile location of a mobile unit MT is registered, whereas in the subscriber location register a mobile unit MT selected by each subscriber SB as a terminal for call terminating use is registered. Upon receiving a terminating call for a subscriber, a switching center SW reads out, from the subscriber location register SL, an identifying number TID of the mobile unit registered by the subscriber SB as a terminal for call terminating use and uses the mobile unit identifying number TID to read out the mobile location of the mobile unit MT from the mobile unit location register ML, thereafter sending the terminating call to the registered mobile unit of the read-out mobile location.Type: GrantFiled: June 17, 1994Date of Patent: July 15, 1997Assignee: NTT Mobile Communications Network, Inc.Inventors: Masami Yabusaki, Yasuo Maruyama, Shoichi Hirata, Hiroshi Nakamura, Yasuyuki Uchiyama, Hiroshi Tsukahara, Eriko Takemoto
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Patent number: 5537882Abstract: A sensor for detecting physical amount in which a gauge resistance value is made not to change even when a wiring material presents a yield phenomenon by wiring a wiring material Such as aluminum presenting a yield phenomenon by thermal stress in a stress insensitive direction of a piezogauge.Type: GrantFiled: October 3, 1994Date of Patent: July 23, 1996Inventors: Seiichi Ugai, Satoshi Shimada, Susumu Murakami, Yoshimi Yamamoto, Yukio Takahashi, Yasuo Maruyama
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Patent number: 5308811Abstract: A catalyst for polymerizing an olefin which consists essentially of a product obtained by contacting (A) a metallocene-type transition metal compound, (B) at least one member selected from the group consisting of clay, clay minerals, ion exchanging layered compounds, diatomaceous earth, silicates and zeolites, and (C) an organic aluminum compound.Type: GrantFiled: May 1, 1992Date of Patent: May 3, 1994Assignee: Mitsubishi Kasei CorporationInventors: Yoshinori Suga, Yasuo Maruyama, Eiji Isobe, Toru Suzuki, Fumihiko Shimizu
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Patent number: 5270409Abstract: A process for producing an olefin polymer which comprises polymerizing an olefin or copolymerizing olefins in the presence of a catalyst comprising a novel solid catalyst component (A), an organometallic compound (B) and an electron donating compound (C) is disclosed. According to the process of the present invention, an olefin polymer excellent in stereospecificity and particle property can be obtained. The catalyst used in the process of the present invention shows a very slight lowering in polymerization activity during a long-term polymerization, and therefore, the productivity of an olefin polymer can be improved.Type: GrantFiled: January 27, 1992Date of Patent: December 14, 1993Assignee: Mitsubishi Kasei CorporationInventors: Yoshinori Suga, Yasuo Maruyama, Fumihiko Shimizu
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Patent number: 5128417Abstract: A modified 3-methylbutene-1 polymer as prepared by grafting a monomer containing an unsaturated group onto a 3-methylbutene-1 homo- or copolymer, a 3-methylbutene-1 polymer composition comprising a 3-methylbutene-1 polymer and a fibrous material, and a molded article comprising a mold of a 3-methylbutene-1 polymer and a thin metallic layer provided on the mold.Type: GrantFiled: June 18, 1990Date of Patent: July 7, 1992Assignee: Mitsubishi Kasei CorporationInventors: Yoshinori Suga, Eiji Tanaka, Nobuo Enokido, Yasuo Maruyama
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Patent number: 5061755Abstract: A highly crystalline propylene polymer composition which is obtained by preliminarily polymerizing, in the presence of a catalyst comprising a solid titanium trichloride catalyst complex containing a complexing agent and having an aluminum content of at most 0.15 by atomic ratio of aluminum to titanium and an organoaluminum compound and optionally an electron donative compound, 3-methylbutene-1 in an amount exceeding 10 g per g of the solid titanium trichloride catalyst complex and then polymerizing propylene, or propylene and other .alpha.-olefin having from 2 to 18 carbon atoms, in an amount of at least 500 g per g of the solid titanium trichloride catalyst complex, and which contains from 0.01 to 20% by weight of the 3-methylbutene-1 polymer based on the total weight of the 3-methylbutene-1 polymer-containing propylene polymer composition.Type: GrantFiled: October 24, 1989Date of Patent: October 29, 1991Assignee: Mitsubishi Kasei CorporationInventors: Yoshinori Suga, Eiji Tanaka, Hidehito Katou, Yasuo Maruyama, Eiji Isobe
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Patent number: 4970187Abstract: A method for producing a olefin polymer, which comprises polymerizing or copolymerizing olefins in the presence of a catalyst comprising:(A) a solid catalyst component obtained by thermally reacting (a.sub.1) a magnesium compound of the formula Mg(OR.sup.1).sub.n (OR.sup.2).sub.2-n wherein each of R.sup.1 and R.sup.2 which may be the same or different is an alkyl group, and aryl group or an aralkyl group, and n is 2.gtoreq.n.gtoreq.0, (a.sub.2) a titanium compound of the formula Ti(OR.sup.3).sub.4 wherein R.sup.3 is an alkyl group, an aryl group or an aralkyl group and (a.sub.3) a silicon compound of the formula Si(OR.sup.4).sub.4 wherein R.sup.4 is an alkyl group, an aryl group or an aralkyl group and contacting and treating (a) the resulting thermal reaction product with (b) a halogen-containing titanium compound and (c) an electron donative compound, and(B) an organometallic compound of a metal of Groups I-III of the Periodic Table.Type: GrantFiled: November 9, 1989Date of Patent: November 13, 1990Assignee: Mitsubishi Kasei CorporationInventors: Yoshinori Suga, Eiji Tanaka, Yasuo Maruyama
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Patent number: 4902761Abstract: A method for producing an olefin polymer, which comprises polymerizing or copolymerizing olefins in the presence of a catalyst comprising:(A) a solid catalyst component obtained by thermally reacting (a.sub.1) a magnesium compound of the formula Mg(OR.sup.1).sub.n (OR.sup.2).sub.2-n wherein each of R.sup.1 and R.sup.2 which may be the same or different is an alkyl group, an aryl group or an aralkyl group, and n is 2.gtoreq.n.gtoreq.0, (a.sub.2) a titanium compound of the formula Ti(OR.sup.3).sub.4 wherein R.sup.3 is an alkyl group, an aryl group or an aralkyl group and (a.sub.3) a silicon compound of the formula Si(OR.sup.4).sub.4 wherein R.sup.4 is an alkyl group, an aryl group or an aralkyl group and contacting and treating (a) the resulting thermal reaction product with (b) a halogen-containing titanium compound and (c) an electron donative compound, and(B) an organometallic compound of a metal of Groups I-III of the Periodic Table.Type: GrantFiled: November 17, 1987Date of Patent: February 20, 1990Assignee: Mitsubishi Kasei CorporationInventors: Yoshinori Suga, Eiji Tanaka, Yasuo Maruyama
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Patent number: 4883848Abstract: A method for producing an olefin polymer, which comprises polymerizing or copolymerizing an olefin in the presence of a catalyst comprising (a) a titanium-containing solid catalyst component and (b) an organic metal compound of a metal of Groups I-III of the Periodic Table, said solid catalyst component (a) being obtained by treating (A) a magnesium compound of the formula Mg(OR.sup.1).sub.n (OR.sup.2).sub.2-n wherein each of R.sup.1 and R.sup.2 is an alkyl group, an aryl group or an aralkyl group, and n is 2.gtoreq.n.gtoreq.0, with three compounds i.e. (B) an electron donative compound, (C) a silicon compound of the formula Si(OR.sup.3).sub.4 wherein R.sup.3 is an alkyl group, an aryl group or an aralkyl group and (D) a titanium compound.Type: GrantFiled: March 6, 1989Date of Patent: November 28, 1989Assignee: Mitsubishi Chemical Industries LimitedInventors: Yoshinori Suga, Eiji Tanaka, Yasuo Maruyama, Eiji Isobe
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Patent number: 4645797Abstract: A 3-methylbutene-1 polymer composition comprising from 10 to 95% by weight of a 3-methylbutene-1 homopolymer, or a copolymer of 3-methylbutene-1 with other .alpha.-olefin having from 2 to 12 carbon atoms, which has a 3-methylbutene-1 content of higher than 90% by weight, and from 5 to 90% by weight of a copolymer of 3-methylbutene-1 with other .alpha.-olefin having from 2 to 12 carbon atoms, which has a 3-methylbutene-1 content of from 40 to 90% by weight, and a process for its production.Type: GrantFiled: February 24, 1986Date of Patent: February 24, 1987Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Yoshinori Suga, Eiji Tanaka, Nobuo Enokido, Yasuo Maruyama
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Patent number: 4380608Abstract: A propylene-ethylene block copolymer in the presence of a catalyst comprises as main components, a solid titanium-containing catalytic component and an organoaluminum compound having the formulaAIR.sub.m.sup.1 Cl.sub.3-m(R.sup.1 represents a C.sub.1-20 hydrocarbon moiety; and m is 3.gtoreq.m>1.5) by producing a homopolymer of propylene or a propylene-ethylene copolymer by polymerizing propylene or both propylene and ethylene at a vapor phase propylene concentration of 90 mol % or higher based on the sum of propylene and ethylene in a first step and producing a propylene-ethylene block copolymer by copolymerizing propylene and ethylene at a vapor phase propylene concentration of less than 90 mol % based on the sum of propylene and ethylene in the presence of the polymer resulted in the first step and the catalyst in a second step is produced by newly adding an aluminum compound having the formulaAlR.sub.n.sup.2 X.sub.3-n(R.sup.2 represents a C.sub.Type: GrantFiled: February 10, 1982Date of Patent: April 19, 1983Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Masayoshi Hasuo, Yoshinori Suga, Hisashi Kitada, Yasuo Maruyama, Junichi Gotoh
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Patent number: 4115532Abstract: Solid titanium trichloride in the form of fine granules having low aluminum compound content, which is suitable as a catalyst for polymerization of .alpha.-olefins, especially, propylene is obtained as a precipitate by heating liquefied titanium trichloride in the presence of a liberating agent, and separating the thus formed precipitate. The liquefied titanium trichloride is preferably prepared with an reducing titanium tetrachloride by organic aluminium compound in the presence of ether and hydrocarbon.Type: GrantFiled: August 1, 1977Date of Patent: September 19, 1978Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Kazuo Yamaguchi, Genjiro Kakogawa, Masayoshi Hasuo, Nobuaki Goko, Yasuo Maruyama
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Patent number: 4115533Abstract: Solid titanium trichloride in the form of fine granules having low aluminum compound content, which is suitable as a catalyst for polymerization of .alpha.-olefins, especially, propylene is obtained as a precipitate by heating liquefied titanium trichloride in the presence of a liberating agent, and separating the thus formed precipitate. The liquified titanium trichloride is preferably prepared with an reducing titanium tetrachloride by organic aluminum compound in the presence of ether and hydrocarbon.Type: GrantFiled: August 1, 1977Date of Patent: September 19, 1978Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Kazuo Yamaguchi, Genjiro Kakogawa, Masayoshi Hasuo, Nobuaki Goko, Yasuo Maruyama
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Patent number: 4060593Abstract: Solid titanium trichloride in the form of fine granules having low aluminum compound content, which is suitable as a catalyst for polymerization of .alpha.-olefins, especially, propylene is obtained as a precipitate by heating liquefied titanium trichloride in the presence of a liberating agent, and separating the thus formed precipitate. The liquefied titanium trichloride is preferably prepared with an reducing titanium tetrachloride by organic aluminium compound in the presence of ether and hydrocarbon.Type: GrantFiled: July 31, 1975Date of Patent: November 29, 1977Assignee: Mitsubishi Chemical IndustriesInventors: Yamaguchi Kazuo, Kakogawa Genjiro, Hasuo Masayoshi, Nobuaki Goko, Yasuo Maruyama