Patents by Inventor Kenji Hirayama
Kenji Hirayama 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: 9028797Abstract: The invention provides an antigen or drug delivery complex containing a complex of an antigen or drug and a cationic molecule, and an anionic molecule encapsulating the same. The antigen or drug delivery complex can be used as a main component of a drug delivery system that delivers various antigens and drugs to a particular cell or organ.Type: GrantFiled: February 24, 2011Date of Patent: May 12, 2015Assignees: Nagasaki University, Kyusyu University Corporation, National University Corporation Hamamatsu University School of MedicineInventors: Hitoshi Sasaki, Tomoaki Kurosaki, Takashi Kitahara, Hideto To, Katsuyuki Yui, Kenji Hirayama, Kouichi Morita, Takahiro Mukai, Yasuhiro Magata, Mikako Ogawa, Kohei Sano
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Publication number: 20130052127Abstract: The invention provides an antigen or drug delivery complex containing a complex of an antigen or drug and a cationic molecule, and an anionic molecule encapsulating the same. The antigen or drug delivery complex can be used as a main component of a drug delivery system that delivers various antigens and drugs to a particular cell or organ.Type: ApplicationFiled: February 24, 2011Publication date: February 28, 2013Applicants: NAGASAKI UNIVERSITY, National University Corporation Hamamatsu University School of Medicine, KYUSYU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Hitoshi Sasaki, Tomoaki Kurosaki, Takashi Kitahara, Hideto To, Katsuyuki Yui, Kenji Hirayama, Kouichi Morita, Takahiro Mukai, Yasuhiro Magata, Mikako Ogawa, Kohei Sano
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Publication number: 20120249227Abstract: A voltage level generator circuit comprised of a fixed voltage generator unit for generating a first electrical current in a fixed quantity from a first supply voltage; a first current mirror circuit unit including a first thin-film NMOSFET and a second thin-film NMOSFET and that outputs a second electrical current proportional to the first electrical current; a protective circuit including: a third thin-film NMOSFET and a first thick-film PMOSFET utilized as a grounded gate for protecting the second thin-film NMOSFET, a first diode for preventing inverse current flow to the first supply, and a second diode for preventing the gate-source voltage of the third thin-film NMOSFET from reaching a negative electrical potential; and a second current mirror circuit for outputting a third electrical current proportional to the second electrical current; and a first Zener diode unit for generating a first fixed voltage from a third electrical current.Type: ApplicationFiled: January 15, 2012Publication date: October 4, 2012Inventors: Ryo NAKAYAMA, Masaki Yoshinaga, Yoshitaka Abe, Kenji Hirayama, Yoshihiro Hayashi
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Patent number: 8002478Abstract: An optical receptacle that enhances the optical coupling tolerance is disclosed. The optical receptacle of the invention provides, in stead of the coupling fiber installed in a conventional optical receptacle, a glass member with a diameter substantially equal to the diameter of the external fiber. The glass member, which is held by the support, provides a convex surface that abuts against the top of the external ferrule and another surface inclined with the optical axis to prevent the light reflected thereat from returning the optical device. The glass member has a substantially homogeneous distribution in the refractive index thereof; accordingly, the fluctuation in the optical coupling with the external ferrule may be reduced.Type: GrantFiled: August 25, 2009Date of Patent: August 23, 2011Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yasunori Michitsuji, Hiromi Nakanishi, Kenji Hirayama
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Publication number: 20100054666Abstract: An optical receptacle that enhances the optical coupling tolerance is disclosed. The optical receptacle of the invention provides, in stead of the coupling fiber installed in a conventional optical receptacle, a glass member with a diameter substantially equal to the diameter of the external fiber. The glass member, which is held by the support, provides a convex surface that abuts against the top of the external ferrule and another surface inclined with the optical axis to prevent the light reflected thereat from returning the optical device. The glass member has a substantially homogeneous distribution in the refractive index thereof; accordingly, the fluctuation in the optical coupling with the external ferrule may be reduced.Type: ApplicationFiled: August 25, 2009Publication date: March 4, 2010Applicant: Sumitomo Electric Industries, Ltd.Inventors: Yasunori MICHITSUJI, Hiromi NAKANISHI, Kenji HIRAYAMA
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Patent number: 7325984Abstract: The present invention provides an optical subassembly that reduces the fluctuation of the optical power due to an external force applied via the optical connector mated with the subassembly. The subassembly provides an optical device, a stub and a joint sleeve. The optical device includes a laser diode (LD), a stem, a lens cap, and a lens. The interval between the optical device and the lens is set greater than a reference interval and the focal length of the lens. The reference interval is set such that, when the interval between the LD and the lens and the interval between the lens and the stub are varied to achieve the maximum optical coupling therebetween at the reference interval between the LD and the lens.Type: GrantFiled: April 12, 2006Date of Patent: February 5, 2008Assignee: Sumitomo Electric Industries, Ltd.Inventors: Hiromi Nakanishi, Kenji Hirayama
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Patent number: 7244069Abstract: A small Faraday rotator is placed in the inner space of a receptacle and a holder. Because the plane of polarization is rotated, even when backreflection light returns to a laser diode, the lasing state does not become unstable. Being placed in the inner space and fixed there, the Faraday rotator can be small and therefore does not increase the part cost notably. The assembly cost does not increase, because it is not required to tightly press-fit a member into a narrow hole.Type: GrantFiled: November 10, 2005Date of Patent: July 17, 2007Assignee: Sumitomo Electic Industries, Ltd.Inventors: Hiromi Nakanishi, Kenji Hirayama, Takeshi Okada
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Patent number: 7207731Abstract: An optical module 11a comprises an optical-receptacle housing 13, an optical-communication subassembly 15, and a holder 17. The flange portion 13b has a plurality of first portions 13c, which extend along a reference plane perpendicular to a predetermined axis, Ax, and a plurality of second portions 13d, each of which is positioned between the first portions 13c. The outer periphery of the first portions 13c is positioned at the outside of a reference cylinder whose center is coincident with the predetermined axis Ax. The outer periphery of the second portions 13d is positioned at the inside of the reference cylinder. The optical-receptacle housing 13 and the holder 17 are temporarily fixed to each other at the second portions 13d of the flange portion 13b through second bonding members 27a to 27d. The optical-receptacle housing 13 and the holder 17 are further fixed with increased strength to each other at the first portions 13c of the flange portion 13b through first bonding members 25a to 25d.Type: GrantFiled: December 19, 2005Date of Patent: April 24, 2007Assignee: Sumitomo Electric Industries, Ltd.Inventors: Mitsuaki Nishie, Hiromi Nakanishi, Kenji Hirayama
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Publication number: 20060275001Abstract: The present invention provides an optical subassembly that reduces the fluctuation of the optical power due to an external force applied via the optical connector mated with the subassembly. The subassembly provides an optical device, a stub and a joint sleeve. The optical device includes a laser diode (LD), a stem, a lens cap, and a lens. The interval between the optical device and the lens is set greater than a reference interval and the focal length of the lens. The reference interval is set such that, when the interval between the LD and the lens and the interval between the lens and the stub are varied to achieve the maximum optical coupling therebetween at the reference interval between the LD and the lens.Type: ApplicationFiled: April 12, 2006Publication date: December 7, 2006Inventors: Hiromi Nakanishi, Kenji Hirayama
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Publication number: 20060159406Abstract: An optical module 11a comprises an optical-receptacle housing 13, an optical-communication subassembly 15, and a holder 17. The flange portion 13b has a plurality of first portions 13c, which extend along a reference plane perpendicular to a predetermined axis, Ax, and a plurality of second portions 13d, each of which is positioned between the first portions 13c. The outer periphery of the first portions 13c is positioned at the outside of a reference cylinder whose center is coincident with the predetermined axis Ax. The outer periphery of the second portions 13d is positioned at the inside of the reference cylinder. The optical-receptacle housing 13 and the holder 17 are temporarily fixed to each other at the second portions 13d of the flange portion 13b through second bonding members 27a to 27d. The optical-receptacle housing 13 and the holder 17 are further fixed with increased strength to each other at the first portions 13c of the flange portion 13b through first bonding members 25a to 25d.Type: ApplicationFiled: December 19, 2005Publication date: July 20, 2006Applicant: Sumitomo Electric Industries, Ltd.Inventors: Mitsuaki Nishie, Hiromi Nakanishi, Kenji Hirayama
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Publication number: 20060098925Abstract: A small Faraday rotator is placed in the inner space of a receptacle and a holder. Because the plane of polarization is rotated, even when backreflection light returns to a laser diode, the lasing state does not become unstable. Being placed in the inner space and fixed there, the Faraday rotator can be small and therefore does not increase the part cost notably. The assembly cost does not increase, because it is not required to tightly press-fit a member into a narrow hole.Type: ApplicationFiled: November 10, 2005Publication date: May 11, 2006Inventors: Hiromi Nakanishi, Kenji Hirayama, Takeshi Okada
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Patent number: 5773321Abstract: A method of counting semiconductor integrated circuit devices comprising steps of forming a semiconductor device block having a plurality of semiconductor integrated circuit devices of vertical mounting type coupled to each other in parallel, and mounting the semiconductor device block on a printed board. A block of semiconductor integrated circuit devices comprising a plurality of semiconductor integrated circuit devices of vertical mounting type, and coupling means for coupling the plurality of semiconductor integrated circuit devices each other in parallel.Type: GrantFiled: December 13, 1996Date of Patent: June 30, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Toshimitsu Ishikawa, Atsushi Kitamura, Kenji Hirayama
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Patent number: 5616962Abstract: A method of mounting semiconductor integrated circuit devices comprising steps of forming a semiconductor device block having a plurality of semiconductor integrated circuit devices of vertical mounting type coupled to each other in parallel, and mounting the semiconductor device block on a printed board. A block of semiconductor integrated circuit devices comprising a plurality of semiconductor integrated circuit devices of vertical mounting type, and coupling means for coupling the plurality of semiconductor integrated circuit devices each other in parallel.Type: GrantFiled: November 28, 1994Date of Patent: April 1, 1997Assignee: Kabushiki Kaisha ToshibaInventors: Toshimitsu Ishikawa, Atsushi Kitamura, Kenji Hirayama