IPR Details
Microsoft Corporation's statement about IPR claimed in RFC 3948

Submitted: February 3, 2006 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")

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Microsoft Corporation Holder legal name Microsoft Corporation

II. Patent Holder's Contact for Licence Application

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Dawna Hoerle Holder contact name Microsoft Standards Inquiries
dawnah@microsoft.com Holder contact email stdsreq@microsoft.com

Microsoft Standards Group
One Microsoft Way
Redmond, WA 98052

Holder contact info

T: 425-707-1911

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

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Internet-Draft: draft-ietf-ipsec-nat-t-ike ("Negotiation of NAT-Traversal in the IKE") Internet-Draft: draft-ietf-ipsec-udp-encaps ("UDP Encapsulation of IPsec ESP Packets") RFC: RFC3948 ("UDP Encapsulation of IPsec ESP Packets")

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:

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

Appln. Nos. 10/348594, 10/284931
Date: 2003-01-21, 2002-10-31
Country: USA

B. Does this disclosure relate to an unpublished pending patent application?:

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No Has patent pending No

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):

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See Text Below for Licensing Declaration Licensing Royalty-Free, Reasonable and Non-Discriminatory License to All Implementers

If Microsoft's contribution(s) is(are) included in an IETF standard and
Microsoft has patent rights that are essential to implement such
standard, Microsoft is prepared to grant a license to the necessary
claims of Microsoft patent rights, to the extent that such claims are
required to implement that IETF standard, on a royalty-free basis with
other reasonable and non-discriminatory terms and conditions, provided a
reciprocal license is granted to Microsoft for any patent claims
necessary to implement the following IETF NAT-Traversal drafts:

Licensing information, comments, notes, or URL for further information

This licensing declaration is limited solely to standards-track IETF documents

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

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Submitter name Microsoft Standards Inquiries
Submitter email stdsreq@microsoft.com

VII. Other Notes

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Additional notes

This is an update to the disclosure that Microsoft Corporation submitted on
2002-07-26. (http://www.ietf.org/ietf/IPR/MICROSOFT-NAT-Traversal.txt)

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