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British Telecomm's patent claim pertaining to Tunnels

This IPR disclosure was submitted by e-mail.

Sections I, II, and IV of "The Patent Disclosure and Licensing Declaration Template for Legacy" have been completed for this IPR disclosure. Additional information may be available in the original submission.

The text of the original IPR disclosure is available further down, and also here:

Update this IPR disclosure. 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.

Submitted Date: November 5, 1999

I. Patent Holder/Applicant ("Patent Holder")
Legal Name: British Telecommunication
II. Patent Holder's Contact for License Application
Name: Peter Hovell
Department: Futures Lab
Address1: B29, Room 128, Adastral Park, Martlesham Heath, IP5 3RE
Telephone: 01473 644208
III. IETF Document or Other Contribution to Which this IPR Disclosure Relates:
Designations for Other Contributions:Tunnels

The text of the original IPR declaration:

The following message was received on November 5, 1999

Subject: Disclosure of Patents to the IETF

In accordance with the IETF Rules,  BT would like to disclose that we have
recently applied for patents in the IPv6 space relating to:

*       the establishment of tunnels using DNS as the tunnel endpoint
discovery mechanism and
*       a mechanism that enables translation and tunneling to be combined
into a single device.

BT does so in the belief that these recent patent application are relevant
to present discussions within the IETF.

Peter Hovell
Futures Lab
B29, Room 128, Adastral Park, Martlesham Heath, IP5 3RE
Tel: 01473 644208
British Telecommunications plc
Registered Office 81 Newgate Street London EC1A 7AJ
Registered in England no 1800000
On November 12, 1999, the following statement was received

Also in accordance with IETF Rules, BT hereby gives the assurance that,
following approval by the IESG of the relevant Internet standards
specification, BT will grant licences under these patent applications and
under any resultant patents, on openly specified, reasonable and
non-discriminatory terms, to implement the Internet standards specification,
provided the licensee similarly grants licences under its necessary

For and behalf of British Telecommunications Plc.
Martin Read
Head of Licensing
Intellectual Property Department
Group Legal Services
British Telecommunications Plc
8th Floor
Holborn Centre
120 Holborn
London EC1N 2TE

Tel: +44 171 492 8152
Fax: +44 171 242 0616