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ARTICLE · 02 APRIL 2026

Third-Party Observation: The “Invisible Sniper” On The Patent Battlefield

Chang Tsi & Partners
Chang Tsi & Partners
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Chang Tsi & Partners

Chang Tsi & Partners

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In today’s increasingly competitive intellectual property landscape, the invention patent risks faced by companies are no longer limited to granted valid patents, but also extend to pending patent applications under substantial examination.

ChinaIntellectual Property

In today’s increasingly competitive intellectual property landscape, the invention patent risks faced by companies are no longer limited to granted valid patents, but also extend to pending patent applications under substantial examination. How can potential risks be mitigated cost-effectively and efficiently before a competitor’s invention patent application is granted? The third-party observation (TPO) serves as a “invisible sniper” capable of striking silently and precisely during the patent examination phase.

Summary: The third-party observation is a low-cost, high-efficiency mechanism enabling pre-grant intervention. It complements post-grant invalidation, forming a vital part of corporate patent risk management. To maximize impact and adoption, it is advisable to engage professional counsel for strategic preparation and submission.

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