Patents by Inventor Yoshihiro Ohba

Yoshihiro Ohba 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).

  • Publication number: 20100133995
    Abstract: An organic electroluminescent device with a pair of electrodes having an anode and a cathode, and one or more organic compound layers disposed therebetween. One of the anode or the cathode is transparent or semitransparent.
    Type: Application
    Filed: November 27, 2009
    Publication date: June 3, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Takeshi Agata, Koji Horiba, Akira Imai, Tadayoshi Ozaki, Yohei Nishino, Hirohito Yoneyama, Daisuke Okuda, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato
  • Patent number: 7658402
    Abstract: An airbag is disposed over almost the entire length along a roof side rail. The airbag comprises a duct formed with a gas introduction hole and a plurality of chambers communicating with the duct. The duct comprises a long first duct part and a short second duct part arranged with the gas introduction hole being provided therebetween. The inlet of a chamber closest to the gas introduction hole in the first duct part has a shape that becomes narrower gradually from the upper part toward the lower part. The passage width of the uppermost part of the inlet of the closest chamber is greater than the depth to the narrowest part thereof, and the passage width of the narrowest part is narrower than the passage width of the first duct part around the inlet thereof.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: February 9, 2010
    Assignee: Autoliv Development AB
    Inventor: Yoshihiro Ohba
  • Patent number: 7659410
    Abstract: Provided are a thiophene-containing compound represented by the following formula (X-1), and an organic electroluminescent device that includes a pair of electrodes and an organic compound layer disposed therebetween. The organic compound layer includes a charge-transporting polyester having a repeating structure containing at least one structure selected from the structures represented by the following formulae (I-1) and (I-2) as its partial structure. In formula (X-1), Ar1 represents a substituted or unsubstituted monovalent aromatic group; and R1 to R4 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n? is an integer of 1 to 5.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: February 9, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Takeshi Agata, Koji Horiba, Akira Imai, Tadayoshi Ozaki, Yohei Nishino, Hirohito Yoneyama, Daisuke Okuda, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato
  • Publication number: 20090232094
    Abstract: A media-independent handover (MIH) environment supports a MIH function that uses a mapping table to communicate with other MIH functions using a MIH transport protocol. The MIH function updates the mapping table upon receipt of a message having fields to invoke an operation. The operation can update an existing mapping or delete a mapping. The operation also can update a lifetime value for a mapping for a particular address. The mapping table includes mappings. A mapping includes a MIH function identifier, a list of transport addresses, and a lifetime value.
    Type: Application
    Filed: October 27, 2008
    Publication date: September 17, 2009
    Applicants: TOSHIBA RESEARCH AMERICA, INC., TELCORDIA TECHNOLOGIES, INC.
    Inventors: Yuu-Heng Alice CHENG, Yoshihiro OHBA
  • Patent number: 7589166
    Abstract: The present invention provides a thiophene-containing compound represented by Formula (I) and a thiophene-containing compound polymer using the thiophene-containing compound. In Formula (I), Ar1 represents a substituted or unsubstituted monovalent aromatic group; X represents a divalent straight-chain hydrocarbon group having 1 to 6 carbon atoms, a divalent branched-chain hydrocarbon group having 2 to 10 carbon atoms, or a substituted or unsubstituted divalent aromatic group; R1 to R5 each independently represent a hydrogen atom, an alkyl group, a cyano group, a halogen group, a substituted amino group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; 1 represents an integer from 1 to 5; and m and k each independently represent 0 or 1.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: September 15, 2009
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Yohei Nishino, Mieko Seki, Takeshi Agata, Kiyokazu Mashimo, Katsuhiro Sato, Hirohito Yoneyama, Daisuke Okuda, Hidekazu Hirose, Toru Ishii
  • Patent number: 7587598
    Abstract: A system and method are provided for establishing a network communication session using fast authentication. In a network system a client or user device may establish a communication session with a server using full authentication. If the session is interrupted or discontinued and resumption of the session is requested, a session identifier of the previously established session may be compared to the session identifier of the requested session. If a match is detected, the session may be resumed using a fast authentication (or re-authentication) procedure such that the session is resumed more efficiently and expediently. Fast authentication may be performed, for example, even when the first session and the resumed second session are of different authentication layers, different types of network interfaces and/or different locations. Thus, a session, such as a TLS session, may resume functionality among multiple defined authentication protocols or technologies such as 802.1X, PANA or cellular based systems.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: September 8, 2009
    Assignees: Toshiba America Research, Inc., Telcordia Technologies, Inc.
    Inventors: Yoshihiro Ohba, Yashuhiro Katsube, Shinichi Baba, Anthony McAuley, Subir Das
  • Publication number: 20090159876
    Abstract: Disclosed is an adequately stable organic semiconductor material which can be used in a coating process while having high regularity and crystallinity. For obtaining such an organic semiconductor material, there is used a compound wherein 6-20 five-membered and/or six-membered aromatic rings are bound. This compound contains a partial structure represented by the formula (1) below, while having a mobility of not less than 1.0×10?3 cm2/Vs and an ionization potential in the solid state of not less than 4.8 eV and not more than 5.6 eV. (1) In the formula, R1 and R2 independently represent a hydrogen atom or a monovalent organic group. In this connection, at least one of R1 and R2 is an optionally substituted aromatic group.
    Type: Application
    Filed: September 20, 2006
    Publication date: June 25, 2009
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Yoshimasa Sakai, Shinji Aramaki
  • Publication number: 20080309056
    Abstract: An airbag is disposed over almost the entire length along a roof side rail. The airbag comprises a duct formed with a gas introduction hole and a plurality of chambers communicating with the duct. The duct comprises a long first duct part and a short second duct part arranged with the gas introduction hole being provided therebetween. The inlet of a chamber closest to the gas introduction hole in the first duct part has a shape that becomes narrower gradually from the upper part toward the lower part. The passage width of the uppermost part of the inlet of the closest chamber is greater than the depth to the narrowest part thereof, and the passage width of the narrowest part is narrower than the passage width of the first duct part around the inlet thereof.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 18, 2008
    Inventor: Yoshihiro Ohba
  • Publication number: 20080312453
    Abstract: The present invention provides a carbazole compound represented by the following formula (I): wherein each Ar1 independently represents a substituted or unsubstituted monovalent aromatic group or an aromatic group containing a heteroring, and R1 and each R2 independently represent a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group.
    Type: Application
    Filed: March 3, 2008
    Publication date: December 18, 2008
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hidekazu HIROSE, Koji HORIBA, Takeshi AGATA, Katsuhiro SATO, Kazuaki SATO, Yoshihiro OHBA
  • Publication number: 20080130647
    Abstract: The present invention relates to reducing the time required to provide an IP address to a mobile node by pro-actively obtaining IP addresses, through the use of PANA-assisted pro-active IP address acquisition, IKEv2-assisted proactive IP address acquisition, or by pro-active IP address acquisition using DHCP only. Where a DHCP is used to pre-configure an IP address in an MPA framework, a PAA generates a plurality of Session-Ids, the plurality of Session-Ids is maintained as a pool of Session-Ids, a Session-Id is retrieved from the pool when the PAA sends a PANA-Auth-Request, and providing a pre-generated IP address to an MN reduces pre-authentication time. Where a IKEv2-assisted pro-active IP address acquisition to pre-fetch IP addresses, is used to reduce the time required to provide an IP address to a MN an IP address is obtained from a CTN as part of a standard IKEv2 procedure.
    Type: Application
    Filed: December 5, 2006
    Publication date: June 5, 2008
    Inventors: Yoshihiro Ohba, Rafael Marin Lopez
  • Publication number: 20080095114
    Abstract: This present application relates to, among other things, Key Caching, QoS and Multicast extensions and improvements to the Media-independent Pre-Authentication (MPA) framework, a new handover optimization mechanism that has a potential to address issues on existing mobility management protocols and mobility optimization mechanisms. MPA is a mobile assisted, secure handover optimization scheme that works over any link-layer and with any mobility management protocol.
    Type: Application
    Filed: August 26, 2007
    Publication date: April 24, 2008
    Inventors: Ashutosh Dutta, Victor Fajardo, Yoshihiro Ohba, Kenichi Tanuichi
  • Publication number: 20070252519
    Abstract: Provided are a thiophene-containing compound represented by the following formula (X-1), and an organic electroluminescent device that includes a pair of electrodes and an organic compound layer disposed therebetween. The organic compound layer includes a charge-transporting polyester having a repeating structure containing at least one structure selected from the structures represented by the following formulae (I-1) and (I-2) as its partial structure. In formula (X-1), Ar1 represents a substituted or unsubstituted monovalent aromatic group; and R1 to R4 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n? is an integer of 1 to 5.
    Type: Application
    Filed: December 12, 2006
    Publication date: November 1, 2007
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Takeshi Agata, Koji Horiba, Akira Imai, Tadayoshi Ozaki, Yohei Nishino, Hirohito Yoneyama, Daisuke Okuda, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato
  • Publication number: 20070183365
    Abstract: A system for media independent handover using a session identifier in which a session identifier is used for identifying a media independent handover registration session across different MIH transport instances between a pair of communicating MIHFs. A point of service maintains a single registration state for a mobile node across the multiple transport instances. A session identifier is assigned by a point of service at the time of initial registration, and is valid only during the lifetime of the registration. A registration state includes local handles to transport instances that are used when sending and receiving media independent handover messages related to the registration.
    Type: Application
    Filed: November 12, 2006
    Publication date: August 9, 2007
    Inventors: Yoshihiro Ohba, Subir Das
  • Publication number: 20070186096
    Abstract: The preferred embodiments provide a novel system and method for reducing authentication delay of a mobile node with a network that includes: employing two EAP runs concurrently to reduce an overall authentication delay. In some embodiments, the two EAP runs are employed for authenticating a particular device identifier of a PaC. In some illustrative embodiments, the two EAP runs are employed for authenticating a particular device identifier of a PaC in relation to connecting to multiple ISPs at the same time.
    Type: Application
    Filed: November 12, 2006
    Publication date: August 9, 2007
    Inventor: Yoshihiro Ohba
  • Publication number: 20070014259
    Abstract: The present invention relates to the use of buffering packets for the mobile node at an access router or network node near the edge of the network that the mobile is moving away from or towards. The buffered packets are then forwarded to the mobile node once the handoff process is completed. This invention also relates to the use of buffering packets originating from the mobile node during the handoff process. The buffered packets are then forwarded to their intended destinations once the handoff process is completed. The buffering system is used in conjunction with existing mobility protocols, access protocols, or as an independent network or link layer mechanism.
    Type: Application
    Filed: August 31, 2005
    Publication date: January 18, 2007
    Applicants: TOSHIBA AMERICA RESEARCH, INC., TELCORDIA INC.
    Inventors: Victor Fajardo, Yoshihiro Ohba, Kenichi Taniuchi, Ashutosh Dutta
  • Patent number: 7161942
    Abstract: A method for distributing and conditioning IP traffic for mobile networks based on differentiated services, wherein edge/border routers are only required to maintain QoS profiles for related mobile stations. A new IP address or a new service level subscription or service level agreement of an mobile station is only sent to related edge/border routers. As a result, unnecessary IP traffic is significantly reduced. The routers in accordance with methods of the invention disregard the contents of an IP payload and therefore all of the IP addresses that a mobile station may posse. A mobile station is permitted to enter into a domain and obtain a desired quality of service (e.g., Gold or Standard service) without the need to maintain the service while moving through the domain.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: January 9, 2007
    Assignees: Telcordia Technologies, Inc., Toshiba America Research, Inc.
    Inventors: Jyh Cheng Chen, Anthony McAuley, Shinichi Baba, Yoshihiro Ohba
  • Publication number: 20060293500
    Abstract: The present invention provides a thiophene-containing compound represented by Formula (I) and a thiophene-containing compound polymer using the thiophene-containing compound. In Formula (I), Ar1 represents a substituted or unsubstituted monovalent aromatic group; X represents a divalent straight-chain hydrocarbon group having 1 to 6 carbon atoms, a divalent branched-chain hydrocarbon group having 2 to 10 carbon atoms, or a substituted or unsubstituted divalent aromatic group; R1 to R5 each independently represent a hydrogen atom, an alkyl group, a cyano group, a halogen group, a substituted amino group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; 1 represents an integer from 1 to 5; and m and k each independently represent 0 or 1.
    Type: Application
    Filed: April 14, 2006
    Publication date: December 28, 2006
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Yohei Nishino, Mieko Seki, Takeshi Agata, Kiyokazu Mashimo, Katsuhiro Sato, Hirohito Yoneyama, Daisuke Okuda, Hidekazu Hirose, Toru Ishii
  • Patent number: 7153980
    Abstract: The present invention relates to a thiophene-containing compound and a thiophene-containing compound polymer which are useful for organo-electronic devices such as electrophotographic photoreceptors (photosensitive elements), organic electroluminescent elements and organic transistors. More specifically, the invention relates to a thiophene-containing compound and a thiophene-containing compound polymer which are excellent in terms of both charge-transporting properties and luminous properties.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: December 26, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Takeshi Agata, Katsuhiro Sato, Kiyokazu Mashimo, Hirohito Yoneyama, Hidekazu Hirose
  • Patent number: 7120145
    Abstract: A node device and a label switched path loop detection method which are capable of detecting a label switched path loop efficiently and quickly are disclosed. In a node device for carrying out the label switching, an ingress node information is included in a message that is to be successively transmitted from the upstream side in order to set up a label switched path, and the fact that the message with the same ingress node information for the same packet flow will be received from a previous hop node that is different from before if the label switched path has a loop formed thereon is utilized. Also, at a time of transmitting a message for the purpose of setting up a label switched path, if a node at which the label switched path for that packet flow already exists on the upstream or downstream side is encountered, this already existing label switched path is traced along the same or opposite direction as the flow, and the label switched path is set up if no loop is detected after tracing to the end.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: October 10, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Ohba, Junichi Takahashi, Shigeo Matsuzawa, Yasuhiro Katsube
  • Publication number: 20060187858
    Abstract: In some of the preferred embodiments, a method for network discovery of a mobile device to use at least one of a plurality of access networks within an IP network includes: obtaining specified network information in the vicinity of a given location based on a set of criteria when a mobile is connected to the IP network from any location.
    Type: Application
    Filed: November 7, 2005
    Publication date: August 24, 2006
    Inventors: Taniuchi Kenichi, Yoshihiro Ohba, Sunl Madhani, Subir Das, Ashutosh Dutta