Our firm, HUAHE IP Limited has achieved a landmark victory in the field of intellectual property protection through professional services and comprehensive strategies.

This article will share our recent success in a patent invalidation litigation case involving LCD displays. This victory not only highlights our professional expertise but also creates tangible value for our client.

Case Information

• Patent Holder: Sunjin Optoelectronics (Nanjing) Co., Ltd.

• Invalidation Petitioner: A third party (represented by our firm)

• Application Number: 200780028571.4

• Filing Date: July 27, 2007

• Patent Title: Polarizer and LCD Display Using the Polarizer

Patent Invalidation Process

Invalidation Request Stage

Our firm was entrusted by the petitioner to file a request for patent invalidation. After two rounds of thorough searches and in-depth technical and legal analysis, we successfully received the invalidation decision from the China National Intellectual Property Administration (CNIPA) on December 30, 2021, declaring the patent entirely invalid.

Litigation Stage

First-Instance Trial

Dissatisfied with the CNIPA's decision, the patent holder filed an administrative lawsuit. On February 20, 2023, the first-instance court ruled to uphold the CNIPA’s invalidation decision, confirming the complete invalidation of the patent.

Second-Instance Trial

The patent holder appealed to the Supreme People’s Court. After one and a half years of trial, the Supreme Court issued a final judgment, affirming the first-instance ruling. Our firm secured another victory, ultimately confirming the full invalidation of the patent.

Key Strategies and Highlights

• Comprehensive Search & Analysis: We conducted two rounds of exhaustive literature searches and analyses to ensure that the invalidation arguments were fully supported by both legal and technical grounds.

• Precise Legal Arguments: Throughout the invalidation request, administrative litigation, and final appeal, we meticulously argued against the patent’s novelty, inventiveness, and relevance to prior art, ultimately gaining the court’s support.

• Efficient Team Collaboration: The success of this case was a result of seamless teamwork, from strategy formulation to evidence submission, demonstrating our professionalism and execution capabilities.