Patents by Inventor Ryosuke Isobe
Ryosuke Isobe 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: 11970396Abstract: A negative thermal expansion material having a negative thermal expansion coefficient according to the present invention is represented by Zr2?aMaSxP2O12+?, where M is at least one selected from Ti, Ce, Sn, Mn, Hf, Ir, Pb, Pd, and Cr; a is 0?a<2; x is 0.4?x?1; and ? is a value defined as to satisfy a charge neutral condition. The present invention makes it possible to provide a negative thermal expansion material, a composite material and a method for producing a negative thermal expansion material that can realize reduction in cost and density reduction.Type: GrantFiled: February 26, 2019Date of Patent: April 30, 2024Assignees: TOKYO INSTITUTE OF TECHNOLOGY, MITSUI MINING & SMELTING CO., LTD.Inventors: Toshihiro Isobe, Yuko Hayakawa, Yuri Adachi, Ryosuke Uehara
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Publication number: 20210261718Abstract: A polymer composition includes: a first proportion of an aliphatic-diisocyanate terminated polyol; a second proportion of an aromatic diisocyanate; a third proportion of an aromatic diamine curative configured to extend a chain length of the aliphatic-diisocyanate-terminated polyol and the aromatic diisocyanate; a fourth proportion of a polyester polyol configured to polymerize with the aliphatic-diisocyanate-terminated polyol; and a fifth proportion of a high functionality dendrimer configured to crosslink polymer chains of the aliphatic-diisocyanate-terminated polyol. Further, the hybrid copolymer can be configured to form a protective film layer in a foldable electronic display, the foldable electronic display including: a cover layer arranged over the protective film layer; and an array of organic light-emitting diodes arranged beneath the protective film layer.Type: ApplicationFiled: May 10, 2021Publication date: August 26, 2021Inventors: Curtis Takagi, Matthew Han, Justin Virgili, Ryosuke Isobe, Brian Flamm, Leize Zhu
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Publication number: 20210103349Abstract: A feedback-enhancing film includes: an elastic layer comprising a first polymer exhibiting optical transparency and elasticity; and an interface layer arranged across an upper surface of the elastic layer comprising a second polymer exhibiting optical transparency, impact resistance, UV resistance, and smoothness to touch. Additionally, the interface layer and the elastic layer mutually deform to resist transverse movement of a stylus tip across the interface layer in response to an application of writing force to the interface layer via the stylus tip. The film can also comprise a system including: the film; a stylus including a stylus tip; and a touch-sensitive screen.Type: ApplicationFiled: December 16, 2020Publication date: April 8, 2021Inventors: Justin Virgili, Micah Yairi, Curtis Takagi, Ryosuke Isobe, Brian Flamm
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Patent number: 10895922Abstract: A feedback-enhancing film includes: an elastic layer comprising a first polymer exhibiting optical transparency and elasticity; and an interface layer arranged across an upper surface of the elastic layer comprising a second polymer exhibiting optical transparency, impact resistance, UV resistance, and smoothness to touch. Additionally, the interface layer and the elastic layer mutually deform to resist transverse movement of a stylus tip across the interface layer in response to an application of writing force to the interface layer via the stylus tip. The film can also comprise a system including: the film; a stylus including a stylus tip; and a touch-sensitive screen.Type: GrantFiled: April 9, 2019Date of Patent: January 19, 2021Assignee: Tactus Technology, Inc.Inventors: Justin Virgili, Micah Yairi, Curtis Takagi, Ryosuke Isobe, Brian Flamm
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Publication number: 20200199358Abstract: A hybrid copolymer composition includes: a first proportion of an aliphatic-diisocyanate terminated polyol; a second proportion of an aromatic diisocyanate; a third proportion of an aromatic diamine curative configured to extend a chain length of the aliphatic-diisocyanate-terminated polyol and the aromatic diisocyanate; a fourth proportion of a polyester polyol configured to polymerize with the aliphatic-diisocyanate-terminated polyol; and a fifth proportion of a high functionality dendrimer configured to crosslink polymer chains of the aliphatic-diisocyanate-terminated polyol. Further, the hybrid copolymer can be configured to form a protective film layer in a foldable electronic display, the foldable electronic display including: a cover layer arranged over the protective film layer; and an array of organic light-emitting diodes arranged beneath the protective film layer.Type: ApplicationFiled: December 20, 2019Publication date: June 25, 2020Inventors: Curtis Takagi, Matthew Han, Justin Virgili, Ryosuke Isobe, Brian Flamm
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Publication number: 20190324566Abstract: A feedback-enhancing film includes: an elastic layer comprising a first polymer exhibiting optical transparency and elasticity; and an interface layer arranged across an upper surface of the elastic layer comprising a second polymer exhibiting optical transparency, impact resistance, UV resistance, and smoothness to touch. Additionally, the interface layer and the elastic layer mutually deform to resist transverse movement of a stylus tip across the interface layer in response to an application of writing force to the interface layer via the stylus tip. The film can also comprise a system including: the film; a stylus including a stylus tip; and a touch-sensitive screen.Type: ApplicationFiled: April 9, 2019Publication date: October 24, 2019Inventors: Justin Virgili, Micah Yairi, Curtis Takagi, Ryosuke Isobe, Brian Flamm
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Patent number: 9324354Abstract: Magnetic storage media that include a multilayer structure are described. In general, the magnetic storage media include a substrate, an underlayer that includes a plurality of underlayer particles formed over the substrate, and a magnetic layer that includes a plurality of magnetic particles formed over the underlayer. The magnetic layer may define a saturated magnetization and thickness product less than or equal to approximately 1.00 memu per square centimeter, and the magnetic particles may be selected from the group consisting of magnetic platelet-shaped particles and magnetic particles with an aspect ratio less than or equal to approximately 1.5. In addition, the described magnetic storage media may exhibit minimal interlayer diffusion between the underlayer and magnetic layer. Reduced interlayer diffusion between different layers of a magnetic recording medium may result in an improved magnetic recording surface for recording and storing data.Type: GrantFiled: April 2, 2010Date of Patent: April 26, 2016Assignee: Sony CorporationInventors: David C. Lowery, Stephen R. Ebner, Ryosuke Isobe, Larold L. Olson, Michael P. Sharrock, Scott A. Walker
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Publication number: 20110242698Abstract: Magnetic storage media that include a multilayer structure are described. In general, the magnetic storage media include a substrate, an underlayer that includes a plurality of underlayer particles formed over the substrate, and a magnetic layer that includes a plurality of magnetic particles formed over the underlayer. The magnetic layer may define a saturated magnetization and thickness product less than or equal to approximately 1.00 memu per square centimeter, and the magnetic particles may be selected from the group consisting of magnetic platelet-shaped particles and magnetic particles with an aspect ratio less than or equal to approximately 1.5. In addition, the described magnetic storage media may exhibit minimal interlayer diffusion between the underlayer and magnetic layer. Reduced interlayer diffusion between different layers of a magnetic recording medium may result in an improved magnetic recording surface for recording and storing data.Type: ApplicationFiled: April 2, 2010Publication date: October 6, 2011Applicant: Imation Corp.Inventors: David C. Lowery, Stephen R. Ebner, Ryosuke Isobe, Larold L. Olson, Michael P. Sharrock, Scott A. Walker
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Publication number: 20110244114Abstract: Magnetic storage media and methods for constructing magnetic storage media that include a multilayer structure are described. In some examples, a magnetic recording medium can be formed by forming an underlayer over a substrate, drying the underlayer, milling a plurality of magnetic particles, and forming a magnetic layer that includes the plurality of magnetic particles over the underlayer. The magnetic particles may be selected from the group consisting of magnetic platelet-shaped particles and magnetic particles with an aspect ratio less than or equal to approximately 1.5. In addition, the milling process may include milling the plurality of magnetic particles so a magnetic medium formed in the absence of an applied magnetic field exhibits a longitudinal squareness less than or equal to approximately 0.40.Type: ApplicationFiled: April 2, 2010Publication date: October 6, 2011Applicant: Imation Corp.Inventors: David C. Lowery, Stephen R. Ebner, Bruce H. Edwards, Ryosuke Isobe, Larold L. Olson, Michael P. Sharrock, Scott A. Walker
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Publication number: 20110244118Abstract: Magnetic storage media and methods for constructing magnetic storage media that include a multilayer structure are described. In general, the magnetic storage media include a substrate, an underlayer formed over the substrate, and a magnetic layer that includes a plurality of magnetic particles formed over the underlayer. In some examples, a magnetic recording medium can be formed by forming an underlayer over a substrate, drying the underlayer, and heat-curing the underlayer prior to forming a magnetic layer over the underlayer. A magnetic layer can then be formed over the underlayer. The magnetic layer may includes a plurality of magnetic particles selected from the group consisting of magnetic platelet-shaped particles and magnetic particles with an aspect ratio less than or equal to approximately 1.5, may then be formed over the underlayer.Type: ApplicationFiled: April 2, 2010Publication date: October 6, 2011Applicant: Imation Corp.Inventors: David C. Lowery, Stephen R. Ebner, Bruce H. Edwards, Ryosuke Isobe, Larold L. Olson, Michael P. Sharrock, Scott A. Walker
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Patent number: 7364809Abstract: A magnetic recording medium including a non-magnetic substrate and a magnetic coating. The non-magnetic substrate defines a front side and a backside. The magnetic coating is formed over the front side and is characterized by an Abrasivity Index of not greater than 350 microinches. In one preferred embodiment, the magnetic coating includes a lower layer formed on the front side of the substrate, and an upper layer formed over the lower layer. In this regard, the upper layer includes a magnetic metal particle dispersed in a binder and otherwise provides the Abrasivity Index. In another embodiment, the magnetic recording medium is a DLT tape.Type: GrantFiled: October 1, 2003Date of Patent: April 29, 2008Assignees: Imation Corp., Quantegy, Inc.Inventors: David C. Lowery, Ryosuke Isobe
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Patent number: 7163714Abstract: A magnetic recording medium including a non-magnetic substrate, a back coat, a lower layer, and a magnetic upper layer. The substrate defines a front side and back side, with the back coat being formed on the back side. The lower layer is disposed over the front side of the substrate and includes a primary powder material and conductive carbon black material dispersed in a binder. The primary lower layer powder material comprises particles having a coercivity of less than 300 Oe coated with an electroconductive material. The magnetic upper layer is disposed over the lower layer and includes a magnetic powder dispersed in a binder.Type: GrantFiled: July 23, 2004Date of Patent: January 16, 2007Assignees: Imation Corp., Quantegy, Inc.Inventors: David C. Lowery, Ryosuke Isobe
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Publication number: 20060188754Abstract: A method for producing a magnetic recording medium includes applying a non-magnetic back coat to a substrate, applying a magnetic front coat to the substrate, in-line calendering the coated substrate using opposed rolls, at least one of the rolls being a generally compliant roll, and off-line calendering the substrate using opposed, generally non-compliant rolls. The off-line calendering optionally includes steel-on-steel calendering and the method optionally includes only one off-line calendering pass and only one in-line calendering pass. Calendering the coated substrate optionally occurs using at least one nip, the calendering including calendering the coated substrate through a final nip including generally non-compliant rolls. Other methods, and magnetic recording media produced by such methods, also are disclosed.Type: ApplicationFiled: April 21, 2006Publication date: August 24, 2006Inventors: David Lowery, Mark Larson, Stephen Ebner, Ryosuke Isobe, Guy Tadlock
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Publication number: 20040265642Abstract: A magnetic recording medium including a non-magnetic substrate, a back coat, a lower layer, and a magnetic upper layer. The substrate defines a front side and back side, with the back coat being formed on the back side. The lower layer is disposed over the front side of the substrate and includes a primary powder material and conductive carbon black material dispersed in a binder. The primary lower layer powder material comprises particles having a coercivity of less than 300 Oe coated with an electroconductive material. The magnetic upper layer is disposed over the lower layer and includes a magnetic powder dispersed in a binder.Type: ApplicationFiled: July 23, 2004Publication date: December 30, 2004Inventors: David C. Lowery, Ryosuke Isobe
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Publication number: 20040253481Abstract: The magnetic recording medium includes a non-magnetic substrate having a front surface and a back surface. Coated on the front surface of the substrate is a lower support layer, or sub-layer, and at least one magnetic upper layer which together comprise the front coating. The magnetic upper layer contains a primary magnetic particulate pigment and a binder system therefor. The topmost magnetic upper layer is compressed, yielding a dense coating, with less than 14% porosity, and has a thickness of from about 0.02 micron to about 0.3 micron. The lower support layer comprises a nonmagnetic or soft magnetic pigment particle, and a binder system therefor. A back coating is formed on the back surface of the substrate. The magnetic medium of the invention has fewer than 400 tape dropouts per square inch at a 60% threshold, and fewer than 30 dropouts per square inch at a 40% threshold.Type: ApplicationFiled: June 12, 2003Publication date: December 16, 2004Inventors: Mark D. Larson, Stephen R. Ebner, David C. Lowery, Ryosuke Isobe
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Patent number: 6818298Abstract: A magnetic recording medium including a non-magnetic substrate, a back coat, a lower layer, and a magnetic upper layer. The substrate defines a front side and back side, with the back coat being formed on the back side. The lower layer is disposed over the front side of the substrate and includes a primary powder material and conductive carbon black material dispersed in a binder. The primary lower layer powder material comprises particles having a coercivity of less than 300 Oe coated with an electroconductive material. The magnetic upper layer is disposed over the lower layer and includes a magnetic powder dispersed in a binder.Type: GrantFiled: October 1, 2002Date of Patent: November 16, 2004Assignees: Imation Corp., Quantegy, Inc.Inventors: David C. Lowery, Ryosuke Isobe
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Publication number: 20040115454Abstract: A magnetic recording medium including a non-magnetic substrate and a magnetic coating. The non-magnetic substrate defines a front side and a backside. The magnetic coating is formed over the front side and is characterized by an Abrasivity Index of not greater than 350 microinches. In one preferred embodiment, the magnetic coating includes a lower layer formed on the front side of the substrate, and an upper layer formed over the lower layer. In this regard, the upper layer includes a magnetic metal particle dispersed in a binder and otherwise provides the Abrasivity Index. In another embodiment, the magnetic recording medium is a DLT tape.Type: ApplicationFiled: October 1, 2003Publication date: June 17, 2004Applicants: Imation Corp., Quantegy, Inc.Inventors: David C. Lowery, Ryosuke Isobe
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Publication number: 20040072030Abstract: A magnetic recording medium including a non-magnetic substrate, a back coat, a lower layer, and a magnetic upper layer. The substrate defines a front side and back side, with the back coat being formed on the back side. The lower layer is disposed over the front side of the substrate and includes a primary powder material and conductive carbon black material dispersed in a binder. The primary lower layer powder material comprises particles having a coercivity of less than 300 Oe coated with an electroconductive material. The magnetic upper layer is disposed over the lower layer and includes a magnetic powder dispersed in a binder.Type: ApplicationFiled: October 1, 2002Publication date: April 15, 2004Applicants: Imation Corp., Quantegy, Inc.Inventors: David C. Lowery, Ryosuke Isobe
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Publication number: 20040072029Abstract: A method for producing a magnetic recording medium includes applying a non-magnetic back coat to a substrate, applying a magnetic front coat to the substrate, in-line calendering the coated substrate using opposed rolls, at least one of the rolls being a generally compliant roll, and off-line calendering the substrate using opposed, generally non-compliant rolls. The off-line calendering optionally includes steel-on-steel calendering and the method optionally includes only one off-line calendering pass and only one in-line calendering pass. Calendering the coated substrate optionally occurs using at least one nip, the calendering including calendering the coated substrate through a final nip including generally non-compliant rolls. Other methods, and magnetic recording media produced by such methods, also are disclosed.Type: ApplicationFiled: March 20, 2003Publication date: April 15, 2004Inventors: David C. Lowery, Mark D. Larson, Stephen R. Ebner, Ryosuke Isobe, Guy Tadlock
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Patent number: 6194058Abstract: A multi-layer magnetic recording medium and a method for making a multi-layered magnetic recording media as described. The recording medium has magnetic inner layer with magnetic particles having a specific squareness ratio and saturation magnetization which results in superior high frequency output and improved overwrite characteristics. The method for making a magnetic recording medium involves controlled, partial drying of the inner layers to avoid intermixing of the respective layers while facilitating efficient fabrication.Type: GrantFiled: July 31, 1998Date of Patent: February 27, 2001Assignee: Quantegy, Inc.Inventors: Ryosuke Isobe, Guy M. Tadlock, Brian McQuay