Patents by Inventor Yasushi Nakano
Yasushi Nakano 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: 5904995Abstract: A stimulable phosphor is disclosed, comprising a rare earth activated alkaline earth metal fluorohalide stimulable phosphor, wherein the rare earth of the phosphor is a rare earth metal selected from the group consisting of Eu, Ce and Gd and the content of the rare earth metal in the surface portion of the particles of the stimulable phosphor being less that in a central portion of said particles. Disclosed is also a radiation image conversion panel comprising a support having thereon a phosphor layer containing the stimulable phosphor.Type: GrantFiled: December 22, 1997Date of Patent: May 18, 1999Assignee: Konica CorporationInventors: Akihiro Maezawa, Haruhiko Masutomi, Yasushi Nakano, Hideaki Wakamatsu
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Patent number: 5805707Abstract: In a radio pager, when encrypting information is attached to a received message, the message is written to an encrypted message memory in distinction from an ordinary message. The message stored in the encrypted message memory is read out and displayed only when decrypting information matching the encrypting information is entered by the user of the pager. The encrypting information may be added to the received message by the user before the message is written to the encrypted message memory. With this configuration, the pager allows only the user or an authorized person to see private messages stored in the encrypted message memory.Type: GrantFiled: July 25, 1996Date of Patent: September 8, 1998Assignee: NEC CorporationInventor: Yasushi Nakano
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Patent number: 5496614Abstract: A magnetic recording medium is disclosed. The recording medium comprises a non-magnetic support and a plurality of magnetic layers being provided on a surface of the support, whereinone of the plural magnetic layers comprises a magnetic material comprising a magnetite iron oxide in which the ratio of divalent iron component Fe.sup.2+ to a trivalent iron component Fe.sup.3+ is0.13.ltoreq.Fe.sup.2+ /Fe.sup.3+ .ltoreq.0.45in atomic number ratio;the other magnetic layers each comprises a magnetic material other than the magnetite iron oxide; andthe non-magnetic support has from 100,000/mm.sup.2 to 4,000,000/mm.sup.2 of protuberances on its surface opposite to the surface on which the magnetic layers are provided.Type: GrantFiled: December 14, 1994Date of Patent: March 5, 1996Assignee: Konica CorporationInventors: Yasushi Nakano, Setsuko Kawahara, Yuji Shimizu, Tohru Miyake
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Patent number: 5488386Abstract: A photoconductive target having a transparent electrode layer and a photoconductive layer on a transparent substrate is disposed opposite to a group of integrated electron beam emitters having gate electrodes. A number of the electron emitters are activated to apply electron beams to the photoconductive target and the activated ones of the electron beam emitters are temporally changed over by an electron emitter selector circuit and a gate selector circuit. Signal charge generated and stored in the photoconductive layer is read. A time-series electric signal corresponding to a spatial distribution of the incident light is generated. A thin imaging apparatus suitable for a larger area is thus provided.Type: GrantFiled: December 2, 1993Date of Patent: January 30, 1996Assignee: Hitachi, Ltd. & Nippon Hoso KyokaiInventors: Toshio Yamagishi, Masakazu Nanba, Norifumi Egami, Kenkichi Tanioka, Mitsuhiro Kurashige, Kazutaka Tsuji, Yoshiyuki Kaneko, Tatsuo Makishima, Kazuyuki Nagatsuma, Tetsuya Ohshima, Yasushi Nakano
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Patent number: 5482762Abstract: A magnetic recording medium having two magnetic layers is disclosed. The magnetic recording medium has a surface fatty acid content of 0.38 to 2.53 .mu.g per square centimeter and a magnetic layer closest to a support contains ferromagnetic powder of Co-containing FeOx wherein x represents 1.33 to 1.43. It is improved in electromagnetic conversion characteristics, light-shielding property and erasing property, and is suitably used for audio or video recording medium.Type: GrantFiled: July 29, 1993Date of Patent: January 9, 1996Assignee: Konica CorporationInventors: Setsuko Kawahara, Yasushi Nakano, Yuji Shimizu, Shoichi Sugitani
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Patent number: 5336559Abstract: A magnetic recording medium is disclosed which is excellent in the electro-magnetic conversion efficiency and inhibited drop-out. The magnetic recording medium cpomprises a non-magnetic support; a non-magnetic layer comprising a carbon black and a binder and being provided on the non-magnetic support; and a magnetic layer containing ferromagnetic metal particles comprising iron and aluminum or a magnetic layer containing tabular-shaped magnetic particles having an axis of easy magnetization with the direction perpendicular to the tabular surface, in which the magnetic layer is provided on the side of the non-magnetic layer farther fron the support by wet-on-wet coating procedure and has a dry thickness of from 0.3 .mu.m to 4.0 .mu.m.Type: GrantFiled: August 18, 1992Date of Patent: August 9, 1994Assignee: Konica CorporationInventors: Hiroaki Yamagishi, Yasushi Nakano, Setsuko Kawahara, Noboru Koyama
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Patent number: 5284716Abstract: A magnetic recording medium is disclosed which comprises a first magnetic layer on a nonmagnetic support and a second magnetic layer on the first magnetic layer.The first magnetic layer contains A parts by weight of at least one of Si and Al per 100 parts by weight of magnetic materials, and the second magnetic layer contains B parts by weight of at least one of Si and Al per 100 parts by weight of magnetic materials, wherein A is smaller than B.This magnetic recording medium is characterized in that: the magnetic recording medium does not stain the conveyance rollers in the manufacturing process; problems which tend to occur when running conventional tapes are greatly reduced; and it is suitable for use as a video tape.Type: GrantFiled: September 5, 1990Date of Patent: February 8, 1994Assignee: Konica CorporationInventors: Yasushi Nakano, Yoshitaka Yasufuku, Noboru Koyama, Masahiro Umemura, Takemasa Namiki, Seiichi Tobisawa, Shigetoshi Kawabe, Takeshi Nakajima
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Patent number: 5191580Abstract: A communication response control method for distributing, from a specific station with the TTRT value (Target-Token Rotation Time) to be set, the TTRT values for all the other stations and forcibly seating the specific station to an arbitration mode in order to set the TTRT values of the whole network. As a result, the desired TTRT values can be set from any station on the network, dispensing with the trouble of setting the TTRT values for the respective stations, and allowing communication response control in cyclic data transmission and event transmission to be more simplified.Type: GrantFiled: October 12, 1990Date of Patent: March 2, 1993Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yasushi Nakano, Yasuhira Tanaka
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Patent number: 5188907Abstract: A magnetic recording medium is disclosed which is excellent in video and audio signal output as well as in S/N ratio. The recording medium comprises first and second magnetic layers provided on a support in this order from said support and the first magnetic layer has a SFD value of from 0.38 to 0.60 and the second magnetic layer has a SFD value of from 0.30 to 0.45, wherein SFD is defined as follows:SFD=.DELTA.H/Hcwhere .DELTA.H is a half-width of magnetic field at the extreme value of differential coefficient of a magnetic induction-magnetic field hysterisis curve, and Hc is a coercive force of a magnetic material.Type: GrantFiled: July 24, 1991Date of Patent: February 23, 1993Assignee: Konica CorporationInventors: Setsuko Kawahara, Yasushi Nakano, Yuji Shimizu, Yasuhisa Yamauchi
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Patent number: 5177069Abstract: The present invention provides a novel class of naphthylsulfonylalkanoic acid compounds such as a structure corrresponding to the formula: ##STR1## or a pharmaceutically acceptable salt thereof. A present invention naphthylsulfonylalkanoic acid compound is useful for prevention or treatment of irritable bowel syndrome, biliary dyskinesia and acute pancreatitis.Type: GrantFiled: December 6, 1990Date of Patent: January 5, 1993Assignee: Kissei Pharmaceutical Co., Ltd.Inventors: Makio Kitazawa, Masuo Akahane, Yasushi Nakano, Atsushi Tsubaki, Kazuaki Sato, Masaaki Ban, Michihiro Kobayashi
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Patent number: 5151323Abstract: A magnetic recording medium and manufacturing method thereof are disclosed. The recording medium comprisesa support,a plurality of magnetic layer being provided on a surface of the support, anda backcoat layer being provided on the other surface of the support and comprising a binder and a carbon black, whereinan outermost magnetic layer being provided at the outermost portion from the support among said plurality of magnetic layers comprises, a binder, a magnetic powder and a carbon black in which the weight ratio of the carbon black to the magnetic powder is 0.1 to 0.5 percent,a magnetic layer other than the outermost magnetic layer comprises a binder, a magnetic powder different from the magnetic powder contained in the outermost layer and a carbon black in which the weight ratio of the carbon black to the magnetic powder is zero to 0.4 percent.The plurality of magnetic layers are coated on the support under a condition of wet on wet.Type: GrantFiled: September 28, 1990Date of Patent: September 29, 1992Assignee: Konica CorporationInventors: Setsuko Kawahara, Yasushi Nakano, Noboru Koyama
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Patent number: 5145869Abstract: The present invention provides a novel class of phenylsulfonylalkanoic acid compounds such as a structure corresponding to the formula: ##STR1## or a pharmaceutically acceptable salt thereof. A present invention phenylsulfonylalkanoic acid compound is useful for prevention or treatment of irritable bowel syndrome, biliary dyskinesia and acute pancreatitis.Type: GrantFiled: April 11, 1991Date of Patent: September 8, 1992Assignee: Kissei Pharmaceutical Co., Ltd.Inventors: Makio Kitazawa, Masuo Akahane, Yasushi Nakano, Atsushi Tsubaki, Kazuaki Sato, Masaaki Ban, Michihiro Kobayashi
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Patent number: 5110658Abstract: A magnetic recording medium having a non-magnetic support and provided thereon a magnetic layer containing a ferromagnetic ion oxide and a binder, said ferromagnetic iron oxide containing Si and/or Al at a proportion of 0.10 to 0.25% by weight and methods of manufacturing a magnetic recording medium are disclosed.Type: GrantFiled: October 17, 1988Date of Patent: May 5, 1992Assignee: Konica CorporationInventors: Yasushi Nakano, Tohru Miyake, Shigeru Akutsu, Yuji Shimizu
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Patent number: 5097792Abstract: A coating apparatus having a first slot between its front and center edges and a second slot between its center and back edges, wherein a coating solution is extruded continuously from each of the slots onto the surface of a flexible support running continuously along the edge surfaces of the front, center, and back edges in that order.The front edge surface has a straight-line portion on at least the terminal end portion of the front edge so that the straight-line portion extends along the direction of movement of the support and is not longer than one mm, and at least one portion of the center and back edge surfaces protrudes from the extension line of the straight-line toward the support.The coating apparatus is suitable for preparing magnetic recording media.Type: GrantFiled: March 8, 1990Date of Patent: March 24, 1992Assignee: Konica CorporationInventors: Masahiro Umemura, Setsuko Kawahara, Takemasa Namiki, Seiichi Tobisawa, Shigetoshi Kawabe, Takeshi Nakajima, Yasushi Nakano, Noboru Koyama
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Patent number: 5098785Abstract: A medium recording medium is provided which has a plurality of coated layers on a nonmagnetic base support, a least one of said coated layer containing a modified copolymer having introduced therein an anionic functional group which forms an intramolecular salt.Type: GrantFiled: November 21, 1989Date of Patent: March 24, 1992Assignee: Konica CorporationInventors: Takafumi Yanagita, Tsutomu Kempo, Narito Goto, Takuo Nishikawa, Noboru Koyama, Yasushi Nakano, Setsuko Kawahara
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Patent number: 5093192Abstract: A magnetic recording medium which has improved electromagnetic conversion characteristics and running ability and is suitable for high-density recording. The magnetic recording medium has at least two magnetic layers which are provided on one side of a support. One of said magnetic layers contains magnetic particles having an aspect ratio of from 3 to less than 8 and the other one contains magnetic particles having an aspect ration of from 8 to 12.Type: GrantFiled: March 16, 1990Date of Patent: March 3, 1992Assignee: Konica CorporationInventors: Setsuko Kawahara, Yasushi Nakano, Noboru Koyama, Masahiro Umemura
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Patent number: 5093193Abstract: A magnetic recording medium and its manufacturing method are disclosed. The medium comprises a non-magnetic support and, provided thereon, a first magnetic layer coated by a first magnetic coating solution and a second magnetic layer coated by a second magnetic coating solution in this order, wherein a dry thickness of the first magnetic layer represented by .mu.m, t.sub.1, a dry thickness of the second magnetic layer represented by .mu.m, t.sub.2, the solid content of the first magnetic coating solution represented by weight %, W.sub.1, and the solid content of the second magnetic coating solution represented by weight %, W.sub.2 have the following relation,2.0.ltoreq.(t.sub.1 /W.sub.1) / (t.sub.2 /W.sub.2).ltoreq.15.Type: GrantFiled: March 23, 1990Date of Patent: March 3, 1992Assignee: Konica CorporationInventors: Noboru Koyama, Setsuko Kawahara, Yasushi Nakano
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Patent number: 5089333Abstract: A magnetic recording medium is disclosed, which has excellent electro-magnetic conversion characteristics and is improved in drop-out. The magnetic recording medium comprises a non-magnetic support and a plurality of magnetic layers provided on the support, and the magnetic layer being provided farthest from said support among these magnetic layers comprises a magnetic powder and a carbon black in an amount of not more than 1 part per 100 parts by weight of said magnetic powder; and another magnetic layer comprising a magnetic powder has a thickness of not more than 2.5 .mu.m, and 900 nm light-transmittance of said magnetic medium is not more than 0.1%.Type: GrantFiled: December 4, 1990Date of Patent: February 18, 1992Assignee: Konica CorporationInventors: Setsuko Kawahara, Noboru Koyama, Yasushi Nakano, Noboru Nakajima
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Patent number: 5084335Abstract: A magnetic recording medium improved in the magnetic recording characteristics, running properties and durability is disclosed. The magnetic recording medium comprises a non-magnetic support having on a side of the support an upper magnetic layer positioned farther from the support and a lower magnetic layer positioned closer to the support. The upper magnetic layer comprises a binder, a magnetic powder having an original BET specific surface area of not less than than 30 m.sup.2 /g and at least one abrasive selected from alumina, silicon carbide, Cr.sub.2 O.sub.3, silica, .alpha.-Fe.sub.2 O.sub.3, TiO.sub.2 and zilconia in a portion of 3 to 20 parts per 100 parts by weight of the magnetic powder, and the lower magnetic layer comprises a binder and a magnetic powder having an original BET specific surface area of less than 30 m.sup.2 /g, and kinds of the binders each contained in the upper magnetic layer and the lower magnetic layer are the same.Type: GrantFiled: September 14, 1989Date of Patent: January 28, 1992Assignee: Konica CorporationInventors: Yasushi Nakano, Setsuko Kawahara, Kikuo Oonuma, Masahiro Umemura, Seiichi Tobisawa, Takeshi Nakajima
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Patent number: 5077131Abstract: A magnetic recording medium having the excellent properties including the electromagnetic conversion properties is disclosed. The magnetic recording medium comprises a support and provided thereon in sequence the first magnetic layer and the second magnetic layer, wherein the first magnetic layer contains a magnetic substance of 1200 to 3500 grains/.mu.m.sup.3 and the magnetic layer contains a magnetic substance of 3500 to 7000 grains/.mu.m.sup.3.Type: GrantFiled: March 16, 1990Date of Patent: December 31, 1991Assignee: Konica CorporationInventors: Yasushi Nakano, Noboru Koyama