IPR Details
AT&T's statement about IPR claimed in RFC 3261

Submitted: May 23, 2005 under the rules in RFC 3979

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

II. Patent Holder's Contact for License Application

Holder contact name
Richard Palazzo
Holder contact email
Holder contact info

Intellectual Property Senior Specialist
AT&T Intellectual Property Licensing
180 Park Avenue
Florham Park, NJ 07932
T: +1 973-236-6693

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

RFC3261 ("SIP: Session Initiation Protocol")

IV. Disclosure of Patent Information i.e., patents or patent applications required to be disclosed by RFC 3979

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

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

6,324,279; 6,574,335; 6,694,429; 10/179684
Date: 11/27/2001; 06/03/2003; 02/17/2004; 01/02/2003
Country: USA

Notes: Also unpublished patent application(s).

B. Does this disclosure relate to an unpublished pending patent application?:

Has patent pending

V. 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):

See Text Below for Licensing Declaration
Licensing information, comments, notes, or URL for further information

This is to advise the IETF that AT&T believes it owns intellectual property
(identified in section V above) that may relate to RFC 3261.

To the extent that the technology discussed in the above referenced IETF
document(s) becomes an IETF Standard, and to the extent claims of AT&T's patents
are required to implement the IETF Standard, AT&T agrees that, upon written
request, AT&T will offer, on a nondiscriminatory basis, non-exclusive licenses
on fair and reasonable terms under such patent claims to implement that IETF
Standard. AT&T's willingness to grant such licenses is conditioned upon the
prospective licensee granting a reciprocal license to AT&T under any patents
that the prospective licensee has to any technology required to implement that
IETF Standard.

Written requests for licenses may be sent to:

AT&T Intellectual Property Licensing
Director, Intellectual Property
180 Park Avenue
Florham Park, NJ 07932

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.

VI. Contact Information of Submitter of this Form

Submitter name
Richard Palazzo
Submitter email

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