IPR Details
Hitachi, Ltd.'s Statement about IPR related to RFC 3666

Submitted: November 15, 2011 under the rules in RFC 3979 as updated by RFC 4879

Note: Updates to IPR disclosures must only be made by authorized representatives of the original submitters. Updates will automatically be forwarded to the current Patent Holder's Contact and to the Submitter of the original IPR disclosure.



I. Patent Holder/Applicant ("Patent Holder")

Holder legal name
Hitachi, Ltd.

II. Patent Holder's Contact for License Application

Holder contact name
Hisashi Kumazaki
Holder contact email
Holder contact info

General Manager
IP Licensing Department II, Intellectual Property Group
Marunouchi Center Building, 6-1 Marunouchi 1-chome
Chiyoda-ku, Tokyo 100-8220 Japan
T: +81-3-5223-4532
F: +81-3-3214-3146

III. Contact Information for the IETF Participant Whose Personal Belief Triggered this Disclosure

Mr. Yoshitaka Iwata
Other info

Planning Manager
Business Planning Dapartment
Hitachi Systemplaza Shinkawasaki,890
Kashimada, Saiwai, Kawasaki, Kanagawa,212-8567 Japan
T: +81-44-549-1794
F: +81-44-549-1793

IV. IETF Document or Other Contribution to Which this IPR Disclosure Relates

RFC3666 ("Session Initiation Protocol (SIP) Public Switched Telephone Network (PSTN) Call Flows")

V. Disclosure of Patent Information i.e., patents or patent applications required to be disclosed by RFC 3979 as updated by RFC 4879

A. For granted patents or published pending patent applications, please provide the following information:

Patent, Serial, Publication, Registration, or Application/File number(s)

See Additional Notes.
Date: See Additional Notes.
Country: See Additional Notes.

Notes: Patents and patent applications:
JP 3732155, granted on October 21, 2005, Japan
JP 3650091, granted on February 25, 2005, Japan
JP 3993206, granted on August 3, 2007, Japan
JP 4130670, granted on May 30, 2008, Japan
JP 3993207, granted on August 3, 2007, Japan
JP 3993208, granted on August 3, 2007, Japan
JP 4177427, granted on August 29, 2008, Japan
JP 4177428, granted on August 29, 2008, Japan
JP 4177429, granted on August 29, 2008, Japan
JP 4177430, granted on August 29, 2008, Japan
JP 4177431, granted on August 29, 2008, Japan
JP 4177432, granted on August 29, 2008, Japan
JP 4177433, granted on August 29, 2008, Japan
JP 4347401, granted on July 24, 2009, Japan
JP 4347405, granted on July 24, 2009, Japan
JP 4347406, granted on July 24, 2009, Japan
US 5604737, granted on February 18, 1997, USA
US 6240085, granted on May 29, 2001, USA
US 7167467, granted on January 23, 2007, USA
US 7502363, granted on March 10, 2009, USA
US 7756117, granted on July 13, 2010, USA
US 7724729, granted on May 25, 2010, USA
US 7808976, granted on October 5,2010, USA
US 7738447, granted on June 15, 2010, USA
US 7724730, granted on May 25, 2010, USA
US 7920550, granted on April 5, 2011, USA
US appl.12/893292, applied on December 13, 1994, USA

B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending

VI. Licensing Declaration

The Patent Holder states that its position with respect to licensing any patent claims contained in the patent(s) or patent application(s) disclosed above that would necessarily be infringed by implementation of the technology required by the relevant IETF specification ("Necessary Patent Claims"), for the purpose of implementing such specification, is as follows(select one licensing declaration option only):

Reasonable and Non-Discriminatory License to All Implementers with Possible Royalty/Fee
Licensing information, comments, notes, or URL for further information

Submitter's agreement to RAND licensing does not and shall not apply in situations where submitter is adverse to a prospective licensee who has declined a RAND license or where submitter and prospective licensee are engaged in a contested matter, including a patent office proceeding, involving any IPR listed in this submission.

Note: The individual submitting this template represents and warrants that he or she is authorized by the Patent Holder to agree to the above-selected licensing declaration.

VII. Contact Information of Submitter of this Form

Submitter name
Yoshitaka Iwata
Submitter email

Only those sections of the relevant entry form where the submitter provided information are displayed.