Apple Takes Legal Action Over Apple Watch Trade Secrets

On August 22, 2025, Apple filed a lawsuit in a U.S. federal court (Northern District of California) targeting Dr. Chen Shi, a former Sensor System Architect on the Apple Watch team, now employed by Chinese electronics giant Oppo. Apple alleges that Shi misappropriated critical trade secrets before his departure.

Table of Contents

Timeline of Alleged Misconduct

Employment at Apple (2020–June 2025): Dr. Shi held a senior role and had access to proprietary information, particularly around emerging health-sensor technologies like ECG, PPG, and temperature sensing.
Final Weeks at Apple: While still employed, Shi attended dozens of one-on-one meetings with Apple Watch’s technical team, gathering insights into ongoing R&D projects.
Data Exfiltration: Three days before his resignation, Shi allegedly downloaded 63 confidential files from a protected Box folder—and transferred them to a USB drive the next day.
Cover-up Behavior: Before or during data transfer, Shi reportedly searched the web for phrases such as “how to wipe a MacBook” and “can somebody see if I’ve opened a file on a shared drive?”—suggesting awareness of scrutiny and intent to erase digital footprints.
Misleading Colleagues: In his resignation letter, he cited “personal and family reasons,” falsely stating he was returning to China to care for elderly parents—while secretly preparing to join Oppo.

Communications Linking Shi and Oppo

Apple uncovered messages on Shi’s Apple-issued iPhone indicating Oppo’s awareness and approval of his actions. One notable exchange (in Chinese) with Oppo’s Vice President of Health, Zijing Zeng, reads:

“… reviewing various internal materials and doing a lot of 1:1 meetings in an effort to collect as much information as possible—will share with you all later.”

The executive allegedly replied simply with “alright” and an “OK” emoji.

These messages form the legal basis for including Oppo (and its U.S. research arm, InnoPeak Technology) as defendants under trade-secret misappropriation claims.

Scope of the Alleged Trade Secrets

Apple asserts that the stolen materials included:

Confidential roadmaps, design and development documentation
Technical specifications of ECG, PPG, and temperature sensor technologies
Chip engineering details and product development plans

These trade secrets are core to Apple’s wearable health technology leadership—and, as Apple argues, could give Oppo an unfair advantage in the competitive smartwatch market.

Legal Grounds & Remedies Sought

Apple’s complaint invokes the Defend Trade Secrets Act (DTSA), which allows federal action for trade-secret theft. It also alleges breach of contract, based on the confidentiality agreement Shi signed when he joined Apple.

In its filing, Apple demands:

Injunctions preventing use or disclosure of its trade secrets
Monetary damages and punitive awards
Attorneys’ fees and other relief deemed appropriate by the court

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Oppo’s Response and Broader Context

Oppo has officially denied wrongdoing, stating it found no evidence linking these allegations to Shi’s actions during his employment there. The company said it respects all trade secrets and pledged to cooperate with the legal process, confident that the justice system will clarify the facts.

This case is part of a growing series of legal battles between Apple and ex-employees or rivals. Past examples include disputes with Masimo over patent rights and an engineer who left for Snap.

Experts see this as emblematic of broader concerns around intellectual property protection, especially in fast-growing segments like health-tech wearables where R&D investments are enormous and replication is tempting.

Implications & What’s Next

For Apple:

A successful ruling could reinforce its IP protection, deter future misconduct, and underscore the high stakes of its wearable innovations.

For Oppo and Competitors:

A loss could hinder its smartwatch ambitions with accelerated lawsuits and cut-offs from critical sensor technologies. Oppo may also adopt stricter internal controls to avoid similar allegations.

For the Tech Industry:

This case highlights the vulnerability of digital intellectual assets—even highly secure ones—and may prompt tighter exit protocols or data access governance across Silicon Valley.

For Apple Watch Users:

Protecting proprietary innovations like ECG and temperature sensing ensures the Apple Watch remains a leader in accuracy and functionality—not just fashion.

Conclusion

The dispute between Apple, Chen Xi and Oppo is more than a crime battle – it’s a showdown about how to protect highbrow assets, preserve expertise and preserve innovation in a globalized technology economy that promises to deliver.

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Apple Takes Legal Action Over Apple Watch Trade Secrets

Timeline of Alleged Misconduct

Communications Linking Shi and Oppo

Scope of the Alleged Trade Secrets

Legal Grounds & Remedies Sought

Oppo’s Response and Broader Context

Implications & What’s Next

For Apple:

For Oppo and Competitors:

For the Tech Industry:

For Apple Watch Users:

Conclusion

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What's Hot

Apple Takes Legal Action Over Apple Watch Trade Secrets

Timeline of Alleged Misconduct

Communications Linking Shi and Oppo

Scope of the Alleged Trade Secrets

Legal Grounds & Remedies Sought

Oppo’s Response and Broader Context

Implications & What’s Next

For Apple:

For Oppo and Competitors:

For the Tech Industry:

For Apple Watch Users:

Conclusion