A Valid Patent Is Not Necessarily an Infringed Patent: Lessons From Apple’s Siri Dispute in China

A patent may be legally valid without necessarily being infringed.

That distinction lies at the centre of a long-running dispute between Apple and Chinese artificial intelligence company Xiao-I concerning Apple’s Siri voice assistant. In March 2026, China’s Supreme People’s Court upheld the validity of Xiao-I’s patent for a “Chat Robot System”, rejecting Apple’s attempt to have it invalidated. However, in separate first-instance judgments issued in June 2026, the Shanghai High People’s Court dismissed Xiao-I’s infringement claims and found that specified Siri-enabled iPhone models did not fall within the patent’s scope of protection. Xiao-I has stated that it intends to appeal those infringement rulings.

To a non-specialist, these outcomes may appear contradictory. How can a court confirm that a patent is valid while also deciding that the defendant’s technology does not infringe it?

The answer is that patent validity and patent infringement are separate legal questions. A patent owner must generally succeed on both before obtaining relief against an alleged infringer.

The Apple–Xiao-I dispute therefore offers a valuable lesson for technology companies, innovators and investors: securing a valid patent is only the beginning. The commercial strength of that patent ultimately depends on the precise scope of its claims and whether an accused product or process falls within them.

The Dispute Over Siri

Xiao-I’s patent concerns a technology described as a “Chat Robot System”. The company has alleged that Siri incorporates technology falling within the protection granted by that patent.

The dispute has developed through several related proceedings.

Xiao-I had previously secured confirmation of the patent’s validity and commenced infringement proceedings against Apple in 2020, seeking an injunction and substantial financial compensation. Apple subsequently pursued proceedings challenging the patent’s validity and also sought a declaration that certain Siri-enabled iPhone models did not infringe it.

On 27 March 2026, the Supreme People’s Court issued a final ruling rejecting Apple’s attempt to invalidate the patent. That decision determined that the patent remained valid and enforceable as a registered intellectual property right.

The validity ruling did not, however, decide whether Siri infringed the patent.

That question remained before the Shanghai High People’s Court. On 10 June 2026, the Court dismissed Xiao-I’s infringement claims and ruled in a parallel non-infringement action that specified iPhone models equipped with Siri did not fall within the patent’s protection. These were first-instance judgments, and Xiao-I announced its intention to appeal to the Supreme People’s Court.

The infringement dispute should therefore not yet be treated as finally concluded.

Patent Validity and Patent Infringement Are Different Questions

Patent validity asks whether the patent should legally exist.

Depending on the applicable legal system, a validity challenge may consider whether the claimed invention is:

• new;
• inventive or non-obvious;
• capable of industrial application;
• sufficiently disclosed; and
• expressed in claims that satisfy applicable legal requirements.

If the patent fails those tests, it may be revoked or declared invalid.

Patent infringement asks a different question:

Does the defendant’s product, process or technology fall within the legally protected scope of the patent claims?

A court may therefore find that a patent satisfies all requirements for validity while also concluding that the accused technology operates differently or omits one or more features required by the claims.

The two findings are legally compatible. International patent jurisprudence recognises validity and infringement as distinct matters, even though the interpretation of the same patent claims may be relevant to both.

Why Patent Claims Matter

The claims are the most legally significant part of a patent.

While the patent specification explains the invention in greater detail, the claims define the boundaries of the exclusive right. Chinese patent law similarly provides that the scope of protection for an invention or utility model is determined by the claims, with the description and drawings available to interpret them.

An infringement analysis does not normally ask whether two technologies serve a broadly similar purpose.

Instead, it examines whether the accused product or process incorporates the technical features required by the relevant patent claim.

This distinction is fundamental.

Two products may both provide conversational artificial intelligence, voice assistance or automated responses without necessarily using the same patented technical method. Patent law protects the claimed invention, not every product that achieves a similar commercial outcome.

A patent for a particular technical architecture does not automatically grant ownership over the broader idea behind that architecture.

The All-Elements Principle

A common approach in patent infringement analysis is to break a claim into its individual technical elements or limitations.

The accused technology is then compared against each of those elements.

As a general principle, literal infringement ordinarily requires every relevant element of the claim to be present in the accused product or process. If an essential element is absent, the claim may not be infringed, even where the two technologies appear similar at a general level. WIPO materials describe this as the “all-elements rule”.

Some legal systems also recognise infringement through equivalent features, depending on the applicable doctrine of equivalents. Even then, the analysis remains focused on the technical substance of the claimed elements rather than on broad functional similarity.

This helps explain how Xiao-I’s patent could remain valid while the Shanghai High People’s Court concluded that the specified Siri-enabled devices did not fall within its scope.

The patent continued to exist. The issue was whether Apple’s technology practised the invention as legally claimed.

Claim Construction Can Determine the Entire Case

Before deciding whether infringement has occurred, a court must determine what the patent claims mean.

This process is known as claim construction.

The court may consider:

• the ordinary meaning of the claim language;
• the patent specification;
• the drawings;
• the technical context;
• the understanding of a person skilled in the relevant field; and
• in some jurisdictions, the history of the patent’s examination.

Claim construction can determine the result of litigation before the court even performs the final comparison with the accused product.

A broad interpretation may increase the likelihood that a competing product falls within the patent. However, interpreting the claims too broadly may also expose the patent to validity challenges based on earlier technology.

A narrow interpretation may preserve validity but make infringement more difficult to prove.

Patent owners therefore face a delicate balance. They cannot necessarily argue for a narrow interpretation when defending validity and then seek a substantially broader interpretation when alleging infringement.

Why Software and AI Patent Disputes Are Particularly Difficult

Software and artificial intelligence disputes make this analysis especially complex.

A consumer may experience two systems as performing the same function. Both may answer questions, process language or produce automated responses. Yet their underlying technical structures may differ materially.

The relevant differences may concern:

• how data is processed;
• where particular functions are performed;
• how components interact;
• whether rules, models or databases are used;
• the sequence of technical operations;
• network architecture;
• data storage and retrieval; or
• the specific means through which a result is generated.

Patent infringement does not ordinarily turn on branding, user experience or commercial purpose alone.

It turns on the relationship between the accused implementation and the claims.

This can make technical evidence decisive. Source code, system architecture, expert analysis, product documentation and testing may all be necessary to determine whether the required claim elements are present.

A Successful Validity Defence Does Not Prove Infringement

The Xiao-I proceedings also illustrate a common misconception among patent owners.

Successfully defeating an invalidity challenge confirms that the patent remains legally enforceable. It does not prove that any particular third-party product infringes it.

Validity establishes the continued existence of the right.

Infringement establishes whether that right has been crossed.

A patent owner contemplating enforcement should therefore assess both issues independently:

1. Is the patent likely to survive a validity challenge?
2. Can infringement of the actual claim language be established through available technical evidence?

A strong position on the first question cannot compensate for weak evidence on the second.

What Patent Owners Should Consider Before Commencing Litigation

Patent litigation can be expensive, technical and prolonged. The Apple–Xiao-I proceedings have developed across numerous stages and related actions over many years.

Before bringing an infringement claim, a patent owner should consider:

• the precise language of the asserted claims;
• the likely interpretation of disputed terms;
• whether each required element is present;
• the availability of technical evidence;
• whether the patent may face invalidity proceedings;
• the commercial value of the alleged infringement;
• the remedies realistically available; and
• the time and cost of enforcement.

An infringement case should not be based solely on the fact that a competing product performs a similar function.

A detailed claim chart, technical review and validity assessment should ordinarily form part of the pre-litigation strategy.

What Technology Companies Should Consider

For companies developing software, artificial intelligence and connected products, the case highlights the importance of freedom-to-operate analysis.

Obtaining patents for a company’s own innovations does not necessarily establish that it is free to commercialise them. A company may own valid patents while still risking infringement of rights held by others.

Technology businesses should therefore consider:

• patent searches before product launch;
• comparison of product architecture against third-party claims;
• documentation of independent development;
• design-around opportunities;
• licensing requirements;
• jurisdiction-specific enforcement risks; and
• ongoing monitoring of competitor patent portfolios.

Where a potentially relevant patent is identified, the analysis should not stop at its title or abstract. The claims must be examined in detail.

Why Patent Drafting Determines Commercial Value

The dispute also demonstrates why the quality of patent drafting matters long after registration.

A patent may describe an innovative and commercially important concept, but its enforceability depends on the claims that were actually granted.

Claims drafted too narrowly may allow competitors to achieve a similar result through a different implementation.

Claims drafted too broadly may face objections or invalidity challenges.

Effective drafting requires an understanding not only of the invention as it exists at the filing date but also of:

• likely commercial applications;
• potential competing designs;
• alternative technical implementations;
• future technological developments; and
• possible enforcement scenarios.

The commercial value of a patent is therefore not measured simply by whether it was granted. It is measured by whether its claims provide meaningful protection against technologies that matter in the marketplace.

Why This Case Matters Beyond China

The Apple–Xiao-I dispute arises under Chinese law, and the eventual outcome of the infringement proceedings will depend on the legal and procedural framework applied by the Chinese courts.

The central lesson, however, is internationally relevant.

Across patent systems, the existence of a valid patent does not automatically prove infringement. Courts must define the scope of the claims and compare them with the accused product or process.

For AI businesses in particular, this distinction is likely to become increasingly important as more companies seek protection for conversational systems, machine learning processes, data architectures and automated decision-making technologies.

As similar products become more common, disputes will increasingly turn not on whether the systems appear alike but on whether they use the same protected technical features.

Conclusion

The Apple–Xiao-I dispute demonstrates that patent ownership and patent enforcement are not the same thing.

Xiao-I successfully defended the validity of its patent before China’s Supreme People’s Court. However, the Shanghai High People’s Court subsequently found at first instance that the specified Siri-enabled iPhones did not fall within the patent’s scope. That infringement determination remains subject to the intended appeal.

The broader legal principle is clear: a patent can be valid, commercially significant and technically sophisticated without necessarily being infringed by a particular product.

For patent owners, the strength of an enforcement claim depends on careful claim construction, persuasive technical evidence and proof that the accused technology contains the features protected by the patent.

For technology companies, the case reinforces the importance of looking beyond patent titles and general functionality. The decisive question is not whether two systems appear to do the same thing. It is whether the accused system falls within the boundaries of the invention as legally claimed.

Al Kabban & Associates

For businesses seeking guidance, Al Kabban & Associates, with over 30 years of experience in UAE law and recognition by Legal 500, stands ready to help corporations build resilience against legal risks while ensuring compliance with local and international standards. For more information or to schedule a consultation, contact us at +971 4 453 9090 or visit www.alkabban.com. You can also follow us on social media for more updates on everything law related in the UAE: @Alkabban_Law

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