Patents by Inventor Gaku Yakushiji
Gaku Yakushiji 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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Publication number: 20200231014Abstract: To provide a suspension arm having good rigidity and reduced weight, which includes a member A composed of a resin composition containing short fibers having a fiber length of less than 10 mm (short-fiber resin composition), and a member B composed of a resin composition containing continuous fibers having a fiber length of 10 mm or more (continuous-fiber resin composition).Type: ApplicationFiled: April 2, 2020Publication date: July 23, 2020Applicant: BRIDGESTONE CORPORATIONInventors: Kanji Tanaka, Norihiko Kaga, Yoichi Nishimuro, Gaku Yakushiji
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Patent number: 8144386Abstract: There are provided particles for display media capable of properly controlling change in an amount of charge by heating and an information display panel, by using the particles for display media capable of eliminating a display failure and reduction in contrast ratio.Type: GrantFiled: September 20, 2004Date of Patent: March 27, 2012Assignee: Bridgestone CorporationInventors: Norihiko Kaga, Kazuya Murata, Gaku Yakushiji
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Publication number: 20120049138Abstract: Particles for display media having charging properties used for information display panel, is characterized in that, in the particles for display media in which an external additive is applied on a surface of a mother particle made of resin, the external additive made of an external additive of an weak hydrophobic property and an external additive made of a metal oxide is used. Herewith, the particles for display media which can drive under a low voltage driving, and thus reduce a cost of the information display panel using such particles for display media are provided.Type: ApplicationFiled: April 30, 2010Publication date: March 1, 2012Applicant: BRIDGESTONE CORPORATIONInventors: Hiroyuki Anzai, Norihiko Kaga, Gaku Yakushiji
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Patent number: 7705823Abstract: Each embodiment relates to an image display device which comprises an image display panel, in which two or more groups of particles having different colors and different charge characteristics are sealed between two substrates, at least one of two substrates being transparent, and, in which the particles, to which an electrostatic field produced by a pair of electrodes provided on one or both substrates is applied, are made to fly and move so as to display an image.Type: GrantFiled: February 7, 2003Date of Patent: April 27, 2010Assignee: Bridgestone CorporationInventors: Norio Nihei, Hajime Kitano, Gaku Yakushiji, Kazuya Murata, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe, Reiji Hattori
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Publication number: 20100014149Abstract: There are provided particles for display media capable of properly controlling change in an amount of charge by heating and an information display panel, by using the particles for display media capable of eliminating a display failure and reduction in contrast ratio.Type: ApplicationFiled: September 20, 2004Publication date: January 21, 2010Applicant: BRIDGESTONE CORPORATIONInventors: Norihiko Kaga, Kazuya Murata, Gaku Yakushiji
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Patent number: 7646530Abstract: In particles for image displaying used in an image display device, in which one or more kind of particles are sealed between opposed substrates, at least one substrate being transparent, and, in which the particles are made to fly and move so as to display an image, each particle has a micro-irregularity at its surface. Moreover, in an image display device, in which one or more kind of particles are sealed between opposed substrates, at least one substrate being transparent, and, in which the particles, to which an electrostatic field produced by two kinds of electrodes having different potentials is applied, are made to fly and move so as to display an image, use is made of each particle having a micro-irregularity at its surface.Type: GrantFiled: April 17, 2003Date of Patent: January 12, 2010Assignee: Bridgestone CorporationInventors: Koji Takagi, Kazuya Murata, Norio Nihei, Gaku Yakushiji, Hajime Kitano, Yoshitomo Masuda, Takahiro Kawagoe
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Patent number: 7525719Abstract: The present invention intends to provide particles for displaying images used in an image display device capable of displaying and eliminating repeatedly accompanied by flight and movement of particles utilizing Coulomb force, being superior in stability, particularly in repetition durability, memory characteristic stability, adaptability for temperature change, having capability of regulating charge amount, and accordingly, favorable images with sufficient contrast should be stably obtained. The present invention provides particles coated with a resin; specifying Span of particle diameter distribution, charge attenuation property, thermal change of the surface hardness, tensile break strength, Izod impact strength (with a notch), abrasion loss (Taber), tensile elastic modulus, flexural elastic modulus, or tear strength. The present invention also proposes about the structure of the particles.Type: GrantFiled: September 19, 2002Date of Patent: April 28, 2009Assignee: Bridgestone CorporationInventors: Gaku Yakushiji, Hajime Kitano, Kazuya Murata, Norio Nihei, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe
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Patent number: 7495819Abstract: In the case of filling and setting the liquid powders or the particles in a plurality of cells formed by the partition walls on the substrate, the method includes the steps of: setting a nozzle at an upper portion of a container; setting the substrate, on which the partition walls are arranged, at a lower portion of the container; scattering the liquid powders or the particles dispersed in a gas from the nozzle arranged at the upper portion in the container; and filling the liquid powders or the particles in the cells on the substrate arranged at the lower portion in the container.Type: GrantFiled: December 17, 2003Date of Patent: February 24, 2009Assignee: Bridgestone CorporationInventors: Ryou Sakurai, Kazuyoshi Akuzawa, Hirotaka Yamazaki, Hiroyuki Anzai, Hajime Kitano, Kazuya Murata, Gaku Yakushiji, Norihiko Kaga, Taichi Kobayashi, Toshiaki Arai, Yoshitomo Masuda
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Patent number: 7443564Abstract: In the particles for display media constituting the display media used for an information display panel, in which the display media are sealed between two substrates, at least one substrate being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information such as an image, the particles for display media, which are produced by crushing resin blocks and classifying them, are that Izot impact strength of the resin constituting the particles for display media (based on ASTM D256) is less than 4 kgf·cm/cm and a deflection temperature under load of the resin constituting the particles for display media (base on ASTM D648) exceeds 100° C.Type: GrantFiled: April 30, 2007Date of Patent: October 28, 2008Assignee: Bridgestone CorporationInventors: Gaku Yakushiji, Yoneji Kobayashi, Kazuya Murata
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Patent number: 7321459Abstract: In the image display device according to the first aspect of the invention, a liquid powder composed of a solid material stably floating as a dispersant in a gas and exhibiting a high fluidity in an aerosol state is sealed between opposed substrates, at least one substrate being transparent, and the liquid powder is moved. Moreover, in the image display device according to the second aspect of the invention, a porous spacer is arranged between opposed substrates, at least one substrate being transparent, a liquid powder composed of a solid material stably floating as a dispersant in gas and exhibiting a high fluidity in an aerosol state is sealed, and the liquid powder is moved.Type: GrantFiled: March 6, 2003Date of Patent: January 22, 2008Assignee: Bridgestone CorporationInventors: Yoshitomo Masuda, Gaku Yakushiji, Kazuya Murata, Norio Nihei, Koji Takagi, Itsuo Tanuma, Hajime Kitano, Takahiro Kawagoe
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Patent number: 7311969Abstract: In a semiconductive member having a coating film containing a conductive agent formed on the surface of a substrate such as an elastic material, or a semiconductive member having an elastic material as a substrate containing a conductive agent, the conductive agent is coated with an ion-containing resin or a resin having high charge attenuation properties.Type: GrantFiled: April 2, 2002Date of Patent: December 25, 2007Assignee: Kabushiki Kaisha BridgestoneInventors: Yoshitomo Masuda, Gaku Yakushiji, Takao Ohuchi, Hajime Kitano
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Publication number: 20070281159Abstract: In the particles for display media constituting the display media used for an information display panel, in which the display media are sealed between two substrates, at least one substrate being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information such as an image, the particles for display media, which are produced by crushing resin blocks and classifying them, are that Izot impact strength of the resin constituting the particles for display media (based on ASTM D256) is less than 4 kgf·cm/cm and a deflection temperature under load of the resin constituting the particles for display media (base on ASTM D648) exceeds 100° C.Type: ApplicationFiled: April 30, 2007Publication date: December 6, 2007Applicant: BRIDGESTONE CORPORATIONInventors: Gaku Yakushiji, Yoneji Kobayashi, Kazuya Murata
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Patent number: 7236291Abstract: An image display device, in which image display media are sealed between opposed substrates, at least one of two substrates being transparent, and in which the image display media, to which an electrostatic field is applied, are made to move so as to display an image. A construction of particles used as the image display media is improved (the first, second, fourth, fifth, sixth, eighth and ninth aspects of the invention), and a material of the particles used as the image display media is improved (the third, seventh and tenth aspects of the invention). Whiteness of the particles and a liquid powder using the particles is improved, particle agglutination is prevented, and the charge property is controlled. Moreover, durability is improved such that a contrast of the image display during a repetition display is not decreased. As a result, an excellent image display can be achieved.Type: GrantFiled: April 2, 2004Date of Patent: June 26, 2007Assignee: Bridgestone CorporationInventors: Norihiko Kaga, Gaku Yakushiji, Hare Tazawa, Maki Masutani, Taichi Kobayashi, Toshiaki Arai, Kazuya Murata, Ryo Sakurai, Yoneji Kobayashi, Hajime Tamura, Hiroyuki Anzai, Hirotaka Yamazaki, Yoichi Nishimuro, Kunio Machida
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Patent number: 7224510Abstract: A reversible image display panel which comprises a pair of substrates one of which is transparent and a group of particles charged with single polarity, a group of particles with single color charged with single polarity, a group of particles having portions with different colors and different charge characteristics, or two groups of particles with different charge characteristics each enclosed between the substrates, characterized in applying an electric field across the substrates, and displaying images by flying and moving the particles. The reversible image display panel and the image display device in accordance with the invention have fast response speed and simple structure, being superior in stability and vividity. In an occasion of driving, generation of the strong electric field is unnecessary for them and accordingly, electric circuits can be assembled employing general purpose electronic materials.Type: GrantFiled: November 21, 2002Date of Patent: May 29, 2007Assignee: Bridgestone CorporationInventors: Hajime Kitano, Gaku Yakushiji, Kazuya Murata, Norio Nihei, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe
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Publication number: 20060238488Abstract: Each embodiment relates to an image display device which comprises an image display panel, in which two or more groups of particles having different colors and different charge characteristics are sealed between two substrates, at least one of two substrates being transparent, and, in which the particles, to which an electrostatic field produced by a pair of electrodes provided on one or both substrates is applied, are made to fly and move so as to display an image.Type: ApplicationFiled: February 7, 2003Publication date: October 26, 2006Inventors: Norio Nihei, Hajime Kitano, Gaku Yakushiji, Kazuya Murata, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe, Reiji Hattori
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Publication number: 20060231401Abstract: In the case of filling and setting the liquid powders or the particles in a plurality of cells formed by the partition walls on the substrate, the method includes the steps of: setting a nozzle at an upper portion of a container; setting the substrate, on which the partition walls are arranged, at a lower portion of the container; scattering the liquid powders or the particles dispersed in a gas from the nozzle arranged at the upper portion in the container; and filling the liquid powders or the particles in the cells on the substrate arranged at the lower portion in the container.Type: ApplicationFiled: December 17, 2003Publication date: October 19, 2006Inventors: Ryou Sakurai, Kazuyoshi Akuzawa, Hirotaka Yamazaki, Hiroyuki Anzai, Hajime Kitano, Kazuya Murata, Gaku Yakushiji, Norihiko Kaga, Taichi Kobayashi, Toshiaki Arai, Yoshitomo Masuda
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Publication number: 20060209008Abstract: An image display device according to first to third aspects of the invention has an image display panel, in which two or more groups of particles having different colors and different charge characteristics are sealed between two substrates, at least one of two substrates being transparent, and, in which the particles, to which an electrostatic field produced by a pair of electrodes provided on respective substrates is applied, are made to fly and move so as to display an image. In the first aspect of the invention, micro-concave portions and/or micro-convex portions are provided to a part of or an overall of a surface of the electrode (first embodiment) or micro-cutout holes are provided to a part of or an overall of a surface of the electrode (second embodiment).Type: ApplicationFiled: April 17, 2003Publication date: September 21, 2006Applicant: Bridgestone CorporationInventors: Norio Nihei, Hajime Kitano, Koji Takagi, Gaku Yakushiji, Kazuya Murata, Ryou Sakurai, Yoshinori Iwabuchi, Hirotaka Yamazaki, Yoshitomo Masuda, Reiji Hattori
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Publication number: 20060146394Abstract: In the image display device, in which the image display media are sealed between opposed substrates, at least one of two substrates being transparent, and in which the image display media, to which an electrostatic field is applied, are made to move so as to display an image, a construction of the particles utilizing as the image display media is improved (the first, second, fourth, fifth, sixth, eighth and ninth aspects of the invention), and, a material of the particles utilizing as the image display media is improved (the third, seventh and tenth aspects of the invention). Therefore, the whiteness of the particles and the liquid powder using the particles can be improved, and it is possible to prevent the particle agglutination and to control the charge property. Moreover, in the image display panel in which the particles and the liquid powder are used as the image display media, it is possible to obtain a durability such that a contrast of the image display during a repetition display is not decreased.Type: ApplicationFiled: April 2, 2004Publication date: July 6, 2006Applicant: BRIDGESTONE CORPORATIONInventors: Norihiko Kaga, Gaku Yakushiji, Hare Tazawa, Maki Masutani, Taichi Kobayashi, Toshiaki Arai, Kazuya Murata, Ryo Sakurai, Yoneji Kobayashi, Hajime Tamura, Hiroyuki Anzai, Hirotaka Yamazaki, Yoichi Nishimuro, Kunio Machida
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Publication number: 20060087718Abstract: In particles for image displaying used in an image display device, in which one or more kind of particles are sealed between opposed substrates, at least one substrate being transparent, and, in which the particles are made to fly and move so as to display an image, each particle has a micro-irregularity at its surface. Moreover, in an image display device, in which one or more kind of particles are sealed between opposed substrates, at least one substrate being transparent, and, in which the particles, to which an electrostatic field produced by two kinds of electrodes having different potentials is applied, are made to fly and move so as to display an image, use is made of each particle having a micro-irregularity at its surface.Type: ApplicationFiled: April 17, 2003Publication date: April 27, 2006Applicant: Bridgestone CorporationInventors: Koji Takagi, Kazuya Murata, Norio Nihei, Gaku Yakushiji, Hajime Kitano, Yoshitomo Masuda, Takahiro Kawagoe
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Publication number: 20060087479Abstract: In a first aspect of the invention, an image display device, in which one or more groups of particles or liquid powders are sealed between opposed two substrates, at least one of two substrates being transparent, and, in which the particles or the liquid powders, to which an electrostatic field produced by two groups of electrodes having different potentials is applied, are made to move so as to display an image, has a construction such that a member for transmitting a signal, which is applied to circuits for an image display, is provided to the substrate by means of an anisotropic conductive film and members such as the electrode are provided to a substrate opposed to a transparent substrate.Type: ApplicationFiled: June 20, 2003Publication date: April 27, 2006Applicant: BRIDGESTONE CORPORATIONInventors: Ryou Sakurai, Hajime Kitano, Norio Nihei, Kazuya Murata, Gaku Yakushiji, Norihiko Kaga, Toshiaki Arai, Yoshitomo Masuda, Hirotaka Yamazaki, Hidefumi Kotsubo, Masato Yoshikawa, Shingo Oono, Yoshinori Iwabuchi