Judges reveal FRAND thinking

Managing IP is part of Legal Benchmarking Limited, 1-2 Paris Gardens, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Judges reveal FRAND thinking

How would courts in Germany, South Korea, China, Japan and the US rule in FRAND cases? Leading judges from each jurisdiction explained what they would do in a mock trial at the AIPPI Congress

Presided over by an international panel of judges, the case involved a dispute between Angel, a non-practising entity holding a standards-essential patent, and Beast, a manufacturer of motor oil barrels that use the standard technology.

Patent ‘545 covers a barrel design that allows the contents to be poured out without leaving any residue through use of a sloping surface near the opening and using a screw cap. Beast’s product has a sloping surface but uses a breakable seal. The patent was granted to an inventor called Lou Zephyr, who submitted the design to the International Organization for Standardization (ISO) straight after filing for the patent, though did not disclose the filing until after its design was picked. Zephyr signed a declaration agreeing to license the patent under FRAND terms. Soon after, Angel bought the patent from Zephyr.

Angel brought the case before the AIPPI court, seeking monetary damages and injunctive relief.

National differences

The case highlighted a number of differences between jurisdictions. Chief judge Ki Young Kim quickly established that there was no literal infringement, but oral arguments concerned whether the doctrine of equivalence applied. Angel argued that though Beast’s product did not use a screw cap, the essential elements were the same and therefore infringing under the doctrine. Beast, on the other hand, asserted that the breakaway seal changes the essential function so there was no equivalence.

Another major issue concerned whether Angel violated its fair, reasonable and non-discriminatory obligations under the ISO and whether it acted in bad faith by not disclosing its patent filing until after the ISO adopted its standard. The court also wrestled with the question whether Zephyr’s declaration agreeing to grant licences on FRAND terms constituted an offer to enter into a contract for Beast to accept.

After nearly two hours of spirited questioning and bantering from the panel, as well as an impromptu happy birthday cheer for expert witness Hwang Lee, the court rendered its decision: Beast infringed Angel’s patent. It also found that while Angel had agreed to license the patent under FRAND terms, no agreement existed between the parties. The court granted Angel’s request for monetary damages and injunctive relief.

After the court handed down the decision, the judges revealed their individual thoughts on the case and highlighted differences in their own jurisdiction’s laws. Chief Judge Randall Rader of the US Court of Appeals for the Federal Circuit pointed out that the doctrine of equivalence is much more limited under US law, and the issue of infringement would probably have been decided differently. Judge Xia Luo of the the People’s Supreme Court of China noted that while she agreed on the infringement finding, she differed on the issue of granting an injunction, given the social cost in preventing goods from entering the market.

The panel consisted of judges Ki Young Kim (Seoul District Court), Peter Meier-Beck (German Federal Court), Makiko Takabe (IP High Court of Japan), Xia Luo (Supreme People’s Court of China), and Randall Rader (Federal Circuit Court of the United States).

Min Ho Lee of Lee & Ko and Seong Tahk Ahn of Central International Law Firm acted as counsel for the plaintiff, while Jehyun Kim of Y P Lee, Mock & Partners and David Chun of Ropes & Gray represented the defendant. Hwang Lee of Korean University Law School was the expert witness, and Ralph Nack of Noerr LLP moderated the session.


Download the AIPPI Congress News, published by Managing IP from Seoul, Korea, from our conference newspapers page.

more from across site and SHARED ros bottom lb

More from across our site

Amongst a sea of mergers, Lathrop GPM and HG Law have set out plans to combine, positioning themselves to compete with both IP boutiques and full-service firms
Patrícia Paias explains why she loves the science and business behind an idea and why potential rights owners must avoid the ‘file and forget’ philosophy
Lawyers eagerly await news of what IP specialist Sir Colin Birss will bring to one of the England and Wales judiciary’s most important roles
María Aurora García of Berken IP explains how intellectual property rights holders can use customs monitoring and online enforcement tools to identify parallel imports and support compliance with consumer protection rules
The Jakarta-based firm says personal networks and a distinctive strategy can help it guide foreign clients through what can be a tricky IP landscape
Munich litigation boutique formed by former Taylor Wessing partners continues expansion as it seeks to cement its position in the UPC market
Yvonne Tang and Siau Wen Lim, the second and third IP specialists to sit on the firm’s management committee, say IP is ‘uniquely positioned’ to support cross-practice work
As competing firms come under common ownership, clients may care less about formal conflicts and more about how openly firms discuss them
Facing increased lateral movement and in-house competition, firms are investing in flexible billing hours and tailored career progression to improve associate retention
As the US reflects on 250 years of independence, patent lawyers say innovation is reshaping old hiring priorities, with firms seeking broader IP expertise over specialisation
Gift this article