Patents by Inventor Seiichi Sakaya

Seiichi Sakaya 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).

  • SESSION CONTROL SERVER, COMMUNICATION DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD, AND PROGRAM AND RECORDING MEDIUM FOR THE SAME
    Publication number: 20090094692
    Abstract: A communication device, connected via a network so as to be able to communicate with a session control server, and which establishes a session with another communication device by performing signal transmission to and reception from the session control server, includes: a unit which generates an asymmetric key pair; a request unit which requests certificate issuance for a public key in the asymmetric key pair; a receiving unit which receives notification of public key issuance completion from the session control server; a storage unit which stores a public key certificate which has been received; a sending unit which sends a location registration request of a communication device to the session control server; and a receiving unit which receives a location registration completed notification which includes a term of validity from the session control server; and which sends a location registration request and a certificate issuance request as a combined request.
    Type: Application
    Filed: October 3, 2008
    Publication date: April 9, 2009
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kumiko Ono, Shinya Tachimoto, Seiichi Sakaya
  • Session control server, communication system
    Publication number: 20060047960
    Abstract: A communication device, connected via a network so as to be able to communicate with a session control server, and which establishes a session with another communication device by performing signal transmission to and reception from the session control server, includes: a unit which generates an asymmetric key pair; a request unit which requests certificate issuance for a public key in the asymmetric key pair; a receiving unit which receives notification of public key issuance completion from the session control server; a storage unit which stores a public key certificate which has been received; a sending unit which sends a location registration request of a communication device to the session control server; and a receiving unit which receives a location registration completed notification which includes a term of validity from the session control server; and which sends a location registration request and a certificate issuance request as a combined request.
    Type: Application
    Filed: June 18, 2004
    Publication date: March 2, 2006
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kumiko Ono, Shinya Tachimoto, Seiichi Sakaya