Patents by Inventor Takafumi Sera

Takafumi Sera 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: 7890515
    Abstract: An article distribution system is provided that can find threads that are active for articles among the users of a community. A user terminal for receiving the contribution of articles that are viewed among users is connected by way of a communication network to an article distribution device for registering articles and appraisal data in an article database. The article distribution device is provided with an article distribution unit, an article registration unit for performing registration, and an article appraisal unit. The article distribution unit receives article distribution requests from the user terminal and transmits article registration data that are relevant to the user terminal. The article registration unit displays article registration data that have been transmitted by the article distribution unit and receives the input of articles that contain cited portions to register these article registration data in the article database.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: February 15, 2011
    Assignee: NEC Corporation
    Inventors: Noriko Takahashi, Takafumi Sera
  • Publication number: 20070136084
    Abstract: An article distribution system is provided that can find threads that are active for articles among the users of a community. A user terminal for receiving the contribution of articles that are viewed among users is connected by way of a communication network to an article distribution device for registering articles and appraisal data in an article database. The article distribution device is provided with an article distribution unit, an article registration unit for performing registration, and an article appraisal unit. The article distribution unit receives article distribution requests from the user terminal and transmits article registration data that are relevant to the user terminal. The article registration unit displays article registration data that have been transmitted by the article distribution unit and receives the input of articles that contain cited portions to register these article registration data in the article database.
    Type: Application
    Filed: June 16, 2006
    Publication date: June 14, 2007
    Inventors: Noriko Takahashi, Takafumi Sera
  • Patent number: 6879589
    Abstract: In a data packet transfer network in which a communication data is transmitted by dividing the communication data to a plurality of data packets, each of a plurality of packet transfer nodes included in the data packet transfer network comprises at least a data packet comparison circuit for comparing sequential numbers of received data packets with sequential numbers of data packets received in the past and a data packet copy circuit for copying the data packets in the order of the sequential numbers thereof and transferring the data packets to a next packet transfer node in the order of the sequential numbers. Data loss is reduced even when there is a time delay until the data is received by a destination node, so that the data is transmitted reliably.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: April 12, 2005
    Assignee: NEC Corporation
    Inventor: Takafumi Sera
  • Patent number: 6829219
    Abstract: A routing processing system in a packet transmission is capable of restricting a delay in a routing process based on particular applications being utilized. The packet transmission routing processing system performs a routing process for an input packet and includes parsing and timer processing for identifying an application corresponding to an intended transmission of an input packet and monitoring a timer value provided for the application.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: December 7, 2004
    Assignee: NEC Corporation
    Inventors: Masahiko Honda, Takafumi Sera
  • Patent number: 6507873
    Abstract: A network address assigning system includes sub-networks connected to each other, a network composed of the sub-networks connected to each other, an address server for managing network addresses of the sub-net-works, nodes for transmitting and receiving messages over the sub-networks, routing nodes for transmitting and receiving messages, for transferring messages over the sub-networks, and for managing addresses of the sub-networks, a change indicator for causing the address server to re-assign network addresses of the sub-networks and for causing the routing nodes to notify the address server of the network addresses of the routing nodes, storage for causing the address server to store address information, and a notifier for causing the address server to communicate with the routing nodes and to notify the routing nodes of network address information that has been newly registered/changed.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: January 14, 2003
    Assignee: NEC Corporation
    Inventors: Yuichi Suzuki, Takafumi Sera
  • Patent number: 6498834
    Abstract: A speech information communication system includes a speech recognizer which converts an input speech signal to character code information and speech feature information. The character code information and the speech feature information are transmitted to a receiving side where the received character code information is converted to an output speech signal depending on the received speech feature information.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: December 24, 2002
    Assignee: NEC Corporation
    Inventor: Takafumi Sera
  • Patent number: 6415313
    Abstract: A communication quality control system for deciding an optimum communication quality in a received datagram to transfer the datagram, in which not only a destination is decided according to the data of the protocol layer 3 and beneath included in the datagram, but also attribute information of communication is taken out by an attribute detecting unit, according to the information of the respective protocol layers 4, 5, 6, and 7 or one of them, and communication quality for sending the datagram is decided by a communication quality deciding unit and a connection communication quality control unit, according to the quality information of connection corresponding to the attribute information taken out.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: July 2, 2002
    Assignee: NEC Corporation
    Inventors: Kenshin Yamada, Takafumi Sera, Akira Arutaki
  • Publication number: 20010005371
    Abstract: In a data packet transfer network in which a communication data is transmitted by dividing the communication data to a plurality of data packets, each of a plurality of packet transfer nodes included in the data packet transfer network comprises at least a data packet comparison circuit for comparing sequential numbers of received data packets with sequential numbers of data packets received in the past and a data packet copy circuit for copying the data packets in the order of the sequential numbers thereof and transferring the data packets to a next packet transfer node in the order of the sequential numbers. Data loss is reduced even when there is a time delay until the data is received by a destination node, so that the data is transmitted reliably.
    Type: Application
    Filed: December 14, 2000
    Publication date: June 28, 2001
    Applicant: NEC Corporation
    Inventor: Takafumi Sera