11 South Square offers extensive experience and expertise in IT and telecoms-related intellectual property matters, including in patent, copyright and database right disputes, and other complex contractual IT disputes which often involve complex technical or scientific content. Given this extensive experience, members are familiar with working with specialist experts in the preparation of expert evidence.

Members of chambers regularly act for major technology companies and corporate clients for some of their most substantial patent disputes including patents for on-chip voltage regulators for microprocessors, live broadcast telecommunications and various declared standards essential patents. Members also have excellent knowledge of FRAND licensing matters having acted in high-profile disputes in the Patents Court concerning the 2G GSM, the 3G UMTS and 4G LTE standards.

Members have represented their clients in the Patents Court, the Technology and Construction Court and the Commercial Court as well as before the appellant courts.

Notable Cases

InterDigital v Lenovo [2023] EWCA Civ 105

This was an appeal by InterDigital against the decision of Mr Justice Mellor in technical trial B in these proceedings which found InterDigital’s patent invalid because it was anticipated over the prior art.  Kyra Nezam...

ABP Technology v Voyetra Turtle Beach [2022] EWCA Civ 594

This was an appeal of a case management decision to allow certain amendments to a statement of case in a trade mark infringement claim. Both sides use the mark STEALTH in relation to headphones for computer gaming. The C...

InterDigital v Lenovo Trial B [2022] EWHC 10 (Pat)

This was the second technical trial in the telecommunications patent case between InterDigital and Lenovo concerning InterDigital’s patent portfolio. The trial concerned essentiality and validity of a patent directed...

CommScope v SOLiD Technologies [2022] EWHC 769 (Pat)

This was a patent infringement action relating to digital antenna systems (“DAS”). The patent was for a digital DAS, in which the internal handling of the analogue RF signals is digitised. The judge, Mellor J, criticised...

Hand Held Products, Inc. v Zebra Technologies Europe Limited & ors [2022] EWHC 640 (Ch)

This patent infringement / invalidity action concerns bar code scanning and imaging technology. The claimants are part of the Honeywell group of companies; the defendants part of the Zebra group. The claimants sued Zebra...

Interdigital Technology v Lenovo [2021] EWHC 2152 (Pat)

Kyra Nezami represented Lenovo in the first technical trial in the telecommunications patent case between InterDigital and Lenovo concerning InterDigital’s patent portfolio. The trial concerned essentiality and validi...

ABP Technology v Voyetra Turtle Beach [2021] EWHC 3096 (Ch)

This was an interim hearing in a trade mark infringement claim.  Both sides use the mark STEALTH in relation to headphones for computer gaming.  The Claimant, ABP Technology, claims infringement of two UK trade marks for...

AutoStore Technology AS v Ocado Group Plc [2021] EWHC 1614 (Pat)

The parties are engaged in patent litigation concerning AutoStore’s patents for automated warehousing technology. By this application, Ocado sought an interim injunction to restrain AutoStore from disclosing certain info...

TQ Delta LLC v ZyXEL Communications UK Limited & anr [2019] EWCA Civ 1277

The Claimant, ("TQ Delta”), is the proprietor of a portfolio of patents which it maintains to be essential to various digital subscriber line (DSL) broadband internet standards.  TQ Delta had given undertakings to the re...

TQ Delta, LLC v ZYXEL Communications Ltd & Anor [2019] EWHC 562

The Claimant, TQ Delta, was the proprietor of two patents relating to Digital Subscriber Line (“DSL”) broadband internet technology.   EP (UK) 1 453 268 concerned a method for controlling the proportion of transmission b...

Clearswift Ltd v Glasswall (IP) Ltd [2018] EWHC 2442 (Pat)

Brian Nicholson and Christopher Hall represented the Claimant in this patent revocation action, in the field of anti-malware software technology. [2018] EWHC 2442 (Pat)...

Adaptive Spectrum and Signal Alignment Inc v British Telecommunications Plc [2014] EWCA Civ 1462

This was an appeal in a patent infringement action brought by ASSIA, a US corporation specialising in ADSL broadband technology, against BT in relation to the Dynamic Line Management System which controls their broadband...

Conductive Inkjet Technology Ltd v Uni-Pixel Displays Inc [2013] EWHC 2968 (Ch)

This was a 2-day application in the High Court in which the Defendant sought to set aside permission to serve proceedings for patent entitlement and breach of confidence outside the jurisdiction on the basis that there w...