Patents by Inventor Michihiro Muta

Michihiro Muta 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).

  • DDNS server, a DDNS client terminal and a DDNS system, and a web server terminal, its network system and an access control method
    Patent number: 7529810
    Abstract: The present invention aims at providing a DDNS server, a DDNS client terminal and a DDNS system which maintains high security while using DHCP and allows an access to terminals having the same IP address as well as data updates. The DDNS server includes a terminal management table storing the domain name, global IP address and port number of a DDNS client terminal, characterized in that the terminal management section checks whether a same global IP address is present in the terminal management table when a request to overwrite a global IP address is made from a DDNS client terminal and, in case the same global IP address is absent, permits overwriting of the global IP address, and in case the same global IP address is present, checks the port number, and in case the same port number is detected, inhibits overwriting of the global IP address, and in case the port number is different, permits overwriting of the global IP address.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: May 5, 2009
    Assignee: Panasonic Corporation
    Inventors: Hironori Goto, Akihiro Nawata, Michihiro Muta
  • DDNS server, a DDNS client terminal and a DDNS system, and a web server terminal, its network system and an access control method
    Publication number: 20030177236
    Abstract: The present invention aims at providing a DDNS server, a DDNS client terminal and a DDNS system which maintains high security while using DHCP and allows an access to terminals having the same IP address as well as data updates. The DDNS server includes a terminal management table storing the domain name, global IP address and port number of a DDNS client terminal, characterized in that the terminal management section checks whether a same global IP address is present in the terminal management table when a request to overwrite a global IP address is made from a DDNS client terminal and, in case the same global IP address is absent, permits overwriting of the global IP address, and in case the same global IP address is present, checks the port number, and in case the same port number is detected, inhibits overwriting of the global IP address, and in case the port number is different, permits overwriting of the global IP address.
    Type: Application
    Filed: March 17, 2003
    Publication date: September 18, 2003
    Inventors: Hironori Goto, Akihiro Nawata, Michihiro Muta