Patents by Inventor Munetaka Washizu

Munetaka Washizu 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).

  • IP communication apparatus and NAT type determination method by the same
    Patent number: 7801059
    Abstract: In a NAT type determination method pursuant to RFC 3489, address information added in a binding response from a STUN server in response to a binding request issued in a latest transmission test is compared with address information added in a binding response in response to any transmission test executed therebefore. When the address information are not identical, a NAT type is determined symmetric. Even when a router whose NAT type changes frequently according to a use status is connected, communication is capable without manual setting change by a user.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: September 21, 2010
    Assignee: Panasonic Corporation
    Inventors: Akira Miyajima, Munetaka Washizu, Hirokazu Hayata, Takeshi Suga
  • IP COMMUNICATION APPARATUS AND NAT TYPE DETERMINATION METHOD BY THE SAME
    Publication number: 20080259943
    Abstract: In a NAT type determination method pursuant to RFC 3489, address information added in a binding response from a STUN server in response to a binding request issued in a latest transmission test is compared with address information added in a binding response in response to any transmission test executed therebefore. When the address information are not identical, a NAT type is determined symmetric. Even when a router whose NAT type changes frequently according to a use status is connected, communication is capable without manual setting change by a user.
    Type: Application
    Filed: April 17, 2008
    Publication date: October 23, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Akira MIYAJIMA, Munetaka WASHIZU, Hirokazu HAYATA, Takeshi SUGA