Patents by Inventor Takeshi Akutsu

Takeshi Akutsu 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).

  • Patent number: 8503843
    Abstract: The present invention provides a hybrid integrated optical module having a high coupling efficiency by suppressing a connection loss between waveguides. A hybrid integrated optical module according to an embodiment of the present invention is an optical module which integrates a semiconductor chip and a PLC chip. The semiconductor chip has a semiconductor waveguide and is mounted on a Si bench. The PLC chip includes a PLC substrate and an optical waveguide formed on the PLC substrate. An end face of the semiconductor chip protrudes from an end face of the Si bench toward the PLC chip side by a protrusion amount X. Gap adjustment (adjustment of a distance D) between the semiconductor waveguide and the optical waveguide becomes possible by setting a position where the end face of the semiconductor chip is brought into contact with an end face of the PLC chip to be a reference position (zero point).
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: August 6, 2013
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Takeshi Akutsu, Junichi Hasegawa, Kazutaka Nara
  • Patent number: 8360522
    Abstract: A vehicle seat comprises a square-frame-shaped seatback frame including a pair of side frames, a seat spring (32A, 32B) mounted between the side frames, a single plate-shaped flexible cushion plate (31) mounted on its back face to the seat spring, a seatback cushion provided in front of the cushion plate, a single plate-shaped flexible auxiliary plate (40) provided between the seatback cushion and the cushion plate and mounted on the cushion plate. The cushion plate has a vertically extending rib (36) with which the lower portion of the auxiliary plate comes in contact.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: January 29, 2013
    Assignee: TS Tech Co., Ltd.
    Inventor: Takeshi Akutsu
  • Patent number: 8287039
    Abstract: A vehicle seat includes a cushion plate mounted on seat springs, a seat cushion provided in front of the cushion plate; and an auxiliary plate provided between the seat cushion and the cushion plate for pushing out the seat cushion forward. The auxiliary plate is provided at its upper portion with a plurality of hooks to be engaged in a plurality of engagement holes formed in the cushion plate. The hooks are engaged in the engagement holes so that they can rotate around a lateral direction but do not move in back-and-forth direction and in a vertical direction.
    Type: Grant
    Filed: April 21, 2007
    Date of Patent: October 16, 2012
    Assignee: TS Tech Co., Ltd.
    Inventor: Takeshi Akutsu
  • Patent number: 8235467
    Abstract: A vehicle seat comprises a cushion plate mounted on upper and lower seat springs, a seat cushion provided on a front side of the cushion plate, an auxiliary plate provided between the seat cushion and the cushion plate for pushing out the seat cushion forward. The cushion plate includes an upper plate located higher than the lower seat spring and a lower plate located lower than the lower seat spring. The lower plate has such elastic force that when the lower plate receives, through the seat back cushion, pressure from a person properly seated on the seat, the lower plate can move backward by a greater distance than the distance of rearward movement of the lower seat spring.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: August 7, 2012
    Assignee: TS Tech Co., Ltd.
    Inventor: Takeshi Akutsu
  • Patent number: 8136878
    Abstract: A vehicle seat comprises a seat frame comprising a lower frame connected to side frames, and a seating frame connected to the lower frame. A connecting structure is formed at a position remote from a rotate center as a connecting portion of an end side of the side frame to the lower frame; the connecting structure comprises an elongated hole formed in the applicable side frame and extending in an up-and-down direction, a convex portion formed on the lower frame, an energy absorbing plate, and a guide member for guiding the energy absorbing plate; and the convex portion and the elongated hole are configured to be relatively movable, while plastically deforming the energy absorbing plate which is supported in an abutting manner by a seating frame side of the convex portion and which is disposed in a clamped manner between the convex portion and the guide member.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: March 20, 2012
    Assignee: TS Tech Co., Ltd.
    Inventors: Kenichi Nitsuma, Takeshi Akutsu
  • Publication number: 20110305253
    Abstract: A semiconductor laser module includes a semiconductor laser section, a light selecting section, and an optical converting section. The semiconductor laser section includes a semiconductor laser substrate, a plurality of semiconductor laser elements mounted on the semiconductor laser substrate, and a first temperature adjusting element for adjusting temperature of the semiconductor laser elements. The light selecting section includes a light selecting element substrate and a light selecting element mounted on the light selecting element substrate and optically connected to the semiconductor laser elements, which selects laser light output from at least one of the semiconductor laser elements.
    Type: Application
    Filed: June 8, 2011
    Publication date: December 15, 2011
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Go KOBAYASHI, Tatsuya KIMOTO, Toshio KIMURA, Takeshi AKUTSU, Kazutaka NARA
  • Patent number: 7971932
    Abstract: A vehicle seat 1 includes a seat back 3, a seat unit 2 for supporting the seat back 3, and a rotary damper 5 for interconnecting the seat back 3 and the seat unit 2, and for tilting the seat back 3 backward while absorbing energy generated by a load when the load is applied to the seat back 3 backward, the load having a predetermined strength or more.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: July 5, 2011
    Assignee: TS Tech Co., Ltd.
    Inventors: Kenichi Niitsuma, Takeshi Akutsu, Masanari Yasuda
  • Patent number: 7958367
    Abstract: When a document creation unit 1 is started, it calculates a hash value of each software piece therein and stores the hash value in a hash value holder 71 and a measurement log document holder 44. The document creation unit 1 accesses a time distribution unit plural times to receive time information therefrom, and records the time information in a log document and a measurement log document. The document creation unit 1 transmits the log document, the measurement log document, and digital signature-embedded hash value information (measurement auxiliary document) in a tamper-resistant device 63 to a document reception device. The document reception device verifies matching of the hash values or digital signature in the document group, confirms software operating environments in the document creation unit 1 from the hash values, and determines whether the time information is correctly managed within the unit 1.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: June 7, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tadaoki Uesugi, Takahiro Fujishiro, Takeshi Akutsu, Hisanori Mishima
  • Publication number: 20110110622
    Abstract: The present invention provides a hybrid integrated optical module having a high coupling efficiency by suppressing a connection loss between waveguides. A hybrid integrated optical module according to an embodiment of the present invention is an optical module which integrates a semiconductor chip and a PLC chip. The semiconductor chip has a semiconductor waveguide and is mounted on a Si bench. The PLC chip includes a PLC substrate and an optical waveguide formed on the PLC substrate. An end face of the semiconductor chip protrudes from an end face of the Si bench toward the PLC chip side by a protrusion amount X. Gap adjustment (adjustment of a distance D) between the semiconductor waveguide and the optical waveguide becomes possible by setting a position where the end face of the semiconductor chip is brought into contact with an end face of the PLC chip to be a reference position (zero point).
    Type: Application
    Filed: November 9, 2010
    Publication date: May 12, 2011
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Takeshi AKUTSU, Junichi Hasegawa, Kazutaka Nara
  • Publication number: 20100194157
    Abstract: A vehicle seat comprises a seat frame comprising a lower frame connected to side frames, and a seating frame connected to the lower frame. A connecting structure is formed at a position remote from a rotate center as a connecting portion of an end side of the side frame to the lower frame; the connecting structure comprises an elongated hole formed in the applicable side frame and extending in an up-and-down direction, a convex portion formed on the lower frame, an energy absorbing plate, and a guide member for guiding the energy absorbing plate; and the convex portion and the elongated hole are configured to be relatively movable, while plastically deforming the energy absorbing plate which is supported in an abutting manner by a seating frame side of the convex portion and which is disposed in a clamped manner between the convex portion and the guide member.
    Type: Application
    Filed: July 17, 2008
    Publication date: August 5, 2010
    Applicant: TS Tech Co., Ltd.
    Inventors: Kenichi Nitsuma, Takeshi Akutsu
  • Publication number: 20100164270
    Abstract: A vehicle seat comprises a square-frame-shaped seatback frame including a pair of side frames, a seat spring (32A, 32B) mounted between the side frames, a single plate-shaped flexible cushion plate (31) mounted on its back face to the seat spring, a seatback cushion provided in front of the cushion plate, a single plate-shaped flexible auxiliary plate (40) provided between the seatback cushion and the cushion plate and mounted on the cushion plate. The cushion plate has a vertically extending rib (36) with which the lower portion of the auxiliary plate comes in contact.
    Type: Application
    Filed: July 9, 2007
    Publication date: July 1, 2010
    Inventor: Takeshi Akutsu
  • Publication number: 20100111468
    Abstract: An optical integrated circuit includes a planar lightwave circuit, and a semiconductor element, which are fixed at one contact surface. A semiconductor optical amplifier (SOA) and a turnaround waveguide having a turnaround portion are formed on a semiconductor substrate. The turnaround waveguide is turned around on the second substrate and is connected to an output port of the SOA. An input port and an output port of the turnaround waveguide are optically coupled at the contact surface with an input port and an output port of the optical waveguides respectively.
    Type: Application
    Filed: June 10, 2009
    Publication date: May 6, 2010
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masaki FUNABASHI, Junichi Hasegawa, Takeshi Akutsu, Kazutaka Nara, Noriyuki Yokouchi
  • Patent number: 7561765
    Abstract: An optical integrated circuit 1 according to the present invention includes a planar lightwave circuit 2, and a semiconductor element 3, which are fixed at one contact surface 12. A semiconductor optical amplifier (SOA) 9 is formed on a semiconductor substrate 8. A semiconductor waveguide 10 and a semiconductor waveguide 11 are formed on an input side and an output side of SOA 9, respectively. The semiconductor waveguide 11 has a turnaround portion 11a turned around on the semiconductor substrate 8. Respective ends of the optical waveguides 5 and 6 on a PLC platform 4 and respective ends of semiconductor waveguides 10 and 11 are optically coupled with each other at the contact surface 12.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: July 14, 2009
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Masaki Funabashi, Junichi Hasegawa, Takeshi Akutsu, Kazutaka Nara, Noriyuki Yokouchi
  • Publication number: 20080301457
    Abstract: When a document creation unit 1 is started, it calculates a hash value of each software piece therein and stores the hash value in a hash value holder 71 and a measurement log document holder 44. The document creation unit 1 accesses a time distribution unit plural times to receive time information therefrom, and records the time information in a log document and a measurement log document. The document creation unit 1 transmits the log document, the measurement log document, and digital signature-embedded hash value information (measurement auxiliary document) in a tamper-resistant device 63 to a document reception device. The document reception device verifies matching of the hash values or digital signature in the document group, confirms software operating environments in the document creation unit 1 from the hash values, and determines whether the time information is correctly managed within the unit 1.
    Type: Application
    Filed: April 25, 2008
    Publication date: December 4, 2008
    Inventors: Tadaoki Uesugi, Takahiro Fujishiro, Takeshi Akutsu, Hisanori Mishima
  • Publication number: 20080240645
    Abstract: An optical integrated circuit 1 according to the present invention includes a planar lightwave circuit 2, and a semiconductor element 3, which are fixed at one contact surface 12. A semiconductor optical amplifier (SOA) 9 is formed on a semiconductor substrate 8. A semiconductor waveguide 10 and a semiconductor waveguide 11 are formed on an input side and an output side of SOA 9, respectively. The semiconductor waveguide 11 has a turnaround portion 11a turned around on the semiconductor substrate 8. Respective ends of the optical waveguides 5 and 6 on a PLC platform 4 and respective ends of semiconductor waveguides 10 and 11 are optically coupled with each other at the contact surface 12.
    Type: Application
    Filed: March 10, 2008
    Publication date: October 2, 2008
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masaki FUNABASHI, Junichi Hasegawa, Takeshi Akutsu, Kazutaka Nara, Noriyuki Yokouchi
  • Publication number: 20080203786
    Abstract: A vehicle seat 1 includes a seat back 3, a seat unit 2 for supporting the seat back 3, and a rotary damper 5 for interconnecting the seat back 3 and the seat unit 2, and for tilting the seat back 3 backward while absorbing energy generated by a load when the load is applied to the seat back 3 backward, the load having a predetermined strength or more.
    Type: Application
    Filed: February 13, 2008
    Publication date: August 28, 2008
    Applicant: TS TECH CO., LTD.
    Inventors: Kenichi Niitsuma, Takeshi Akutsu, Masanari Yasuda
  • Publication number: 20020069129
    Abstract: Techniques that allow trust evaluation institutions to share trust information of members (users) belonging to different trust evaluation institutions. A member registered at one trust evaluation institution can carry out a transaction with a member registered at another trust evaluation institution even if the trust evaluation institutions use different techniques, methods, procedures, or standards for evaluating trust information for their members.
    Type: Application
    Filed: September 13, 2001
    Publication date: June 6, 2002
    Inventors: Takeshi Akutsu, Hiroyuki Chiba, Akira Morita, Kiyoshi Watanabe, Satoshi Takemoto, Yoshitaka Narishima, Yoshiaki Kawatsura
  • Publication number: 20020046189
    Abstract: The present invention provides a payment method that balances reliability, security, and speed of payments, a system for the same, and a recording medium storing a program for the same. In one embodiment, a financial institution such as a credit company, a bank, or the like determines whether or not a payment request from a buyer is valid using billing information from the merchant involved in the payment and authentication information from the buyer. Then, if the billing information sent from the merchant does not match the ordering information extracted from the authentication information, the payment request is rejected.
    Type: Application
    Filed: July 5, 2001
    Publication date: April 18, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Akira Morita, Hiroyuki Chiba, Takeshi Akutsu, Satoshi Takemoto, Yoshitaka Narishima, Yoshiaki Kawatsura, Kiyoshi Watanabe
  • Publication number: 20020018566
    Abstract: Recipient machine sends a contents request message with recipient's public key to entitlement granter machine. On the entitlement granter machine, digital rights data relevant to the contents request is encrypted with the recipient's public key. Encrypted digital rights data with the entitlement granter's digital signature thereon is returned to recipient machine. On the recipient machine, encrypted digital rights data is decrypted with the recipient's secret key. The recipient machine sends a message containing digital rights data thus decrypted, recipient's public key, and the above encrypted data to contents distributor machine.
    Type: Application
    Filed: February 13, 2001
    Publication date: February 14, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Yoshiaki Kawatsura, Hiroyuki Chiba, Kiyoshi Watanabe, Akira Morita, Tomochika Tomiyama, Takeshi Akutsu