Patent Practice
Senior practitioner-level analysis of patent claims, technical disclosures, prior art, prosecution, infringement and validity issues.
ABOUT LEO LIU
24+ Years of Patent Practice Across Law, Technology and International Markets
Leo Liu is a Chinese Patent Agent and the founder of CrossVision IP Consulting (跨域知见), an independent intellectual-property advisory practice based in Shenzhen, China.
He has worked in intellectual property since 2002, with more than two decades of hands-on experience in patent drafting, prosecution, prior-art analysis, Office Action strategy, patent infringement, cross-border patent practice and international IP risk.
His current work brings together three areas: senior patent practice, cross-border intellectual property and the application of patent-domain expertise to AI training and evaluation.
Cross-Border IP
Chinese, U.S., European and PCT patent matters, particularly China-to-U.S. and China-to-Europe prosecution and risk analysis.
AI & Patent Evaluation
Application of patent-domain expertise to AI-assisted analysis, model-output evaluation, factual verification and legal/technical quality assurance.
PROFESSIONAL PROFILE
A Career Built on Hands-On Patent Work
Leo began his intellectual-property career in 2002 and qualified as a Chinese Patent Agent in 2004. Over the following 24+ years, he has worked with Chinese and international patent matters involving patent drafting, examination, prior art, claim amendments, patentability, infringement, validity and overseas patent strategy.
His professional experience includes senior and management roles within Chinese patent agencies, international patent coordination, direct work with corporate IP teams and collaboration with foreign patent counsel.
Today, through CrossVision IP, he focuses on Patent and IP subject-matter expertise for AI evaluation, Chinese Patent Law and CNIPA practice, cross-border prosecution support, FTO, infringement and validity analysis, and Chinese-English patent work.
CAREER
Selected Career Timeline
CrossVision IP Consulting · 深圳跨域知见顾问有限公司
Founder
Founded an independent IP consulting practice in Shenzhen focused on patent and intellectual-property subject-matter expertise, AI-assisted patent evaluation, Chinese patent law and cross-border patent practice.
- Patent/IP SME and AI evaluation work
- Chinese Patent Law and CNIPA
- USPTO/EPO prosecution support
- FTO, infringement and validity analysis
- Chinese-English patent review
- Training and professional thought leadership
Innova IP · 广州英诺汇华知识产权代理事务所
Executive Partner · Senior Patent Practitioner
Provided senior-level patent prosecution, analysis and cross-border patent support involving Chinese and international patent matters.
- Senior review of patent drafting and prosecution
- CNIPA examination analysis
- International patent coordination
- USPTO/EPO support
- FTO, infringement and validity analysis
- Patent-work-product quality assurance
Zhuhai Zhizhuan Patent & Trademark Agency
Director of International Affairs · Patent Agent
Spent fourteen years working extensively on international and foreign-related patent matters for Chinese and overseas clients.
- PCT applications and overseas prosecution coordination
- Foreign-originated PCT applications entering China
- Patent drafting and translation
- Office Action analysis
- Bilingual patent documentation
- International client and foreign-counsel coordination
Matters during this period involved patent systems in the United States, Europe, Canada, Australia, Japan, Southeast Asia and other jurisdictions.
Guangzhou Yuegao Patent Agency
Patent Agent
Began professional patent practice in 2002, handling Chinese patent prosecution, patent drafting, Office Action analysis, prior-art review and client advisory work.
Obtained the Chinese Patent Agent qualification in 2004.
QUALIFICATIONS
Professional Qualifications & Education
Chinese Patent Agent
More than two decades of hands-on experience in patent drafting, prosecution, examination analysis and international patent work.
Intellectual Property Professional
Professional Qualification, China · 2021.
South China University of Technology
Engineering background, with studies in Engineering Mechanics.
PUBLIC-SERVICE & EXPERT ROLES
Patent Expertise Applied Beyond Prosecution
Leo has been selected for a range of government-recognized intellectual-property expert, technical-investigation and dispute-resolution roles in China.
Guangdong Province IP Expert Pool
First-Designated IP Expert
Guangzhou Intellectual Property Protection Center
Overseas IP Enforcement Expert
Wuhan Intellectual Property Protection Center
Overseas IP Dispute Response Expert
Guangdong Provincial Administration for Market Regulation
Technical Investigation Officer — IP Administrative Enforcement. Provides technical analysis supporting intellectual-property administrative enforcement, including patent-claim interpretation, technical-feature comparison and infringement-related assessment.
Guangdong IP Disputes People's Mediation Committee
Mediator
Greater Bay Area Intellectual Property Mediation Center
Invited Mediator
Guangdong Province Exhibition IP Expert Database
Trade Fair IP Protection Expert
TECHNICAL INVESTIGATION
Patent Analysis in Real Disputes
Leo's professional work includes technical investigation in patent infringement matters, where the task is to separate legal claim language from the underlying technical facts and evaluate the correspondence between claimed features and accused products.
During his 2024–2026 technical-investigation term, Leo has participated in multiple patent infringement investigations involving invention patents, utility models and designs.
- Claim-feature decomposition
- All-elements comparison
- Literal infringement analysis
- Technical-equivalence analysis
- Accused-product technical review
- Examination of technical evidence
- Written technical-investigation opinions
- Industrial-design similarity assessment where relevant
TRADE FAIR IP PROTECTION
IP Enforcement in Commercial Settings
Leo has repeatedly served as an intellectual-property expert at the Canton Fair and other major trade exhibitions, assisting with on-site investigation of IP infringement complaints.
Rights & Products
Reviewing asserted IP rights, accused products and the relevant patent or technical issues.
Complaint Investigation
Assisting complaint investigations and providing independent expert views to exhibition organizers.
Disciplined Assessment
These engagements require rapid but disciplined assessment of legal rights, technical products and evidentiary records in commercially sensitive situations.
CROSS-BORDER ENFORCEMENT
Experience Supporting Overseas Patent Risk and Design-Around Strategy
Leo has supported a Chinese enterprise in responding to a U.S. Section 337 investigation, including analysis associated with a design-around solution.
The redesigned technical solution subsequently obtained U.S. patent protection and was implemented in products entering the U.S. market.
Overseas patent riskProduct design-aroundInfringement analysisFTO strategyCross-border enforcement
CROSS-BORDER PRACTICE
China · United States · Europe · PCT
CNIPA
- Patent drafting and prosecution
- Novelty and inventive step
- Claim amendments
- Reexamination and invalidation
- Infringement
- PCT national phase
USPTO Support
- Claim drafting and adaptation
- Office Action and amendment analysis
- §§ 101 / 102 / 103 / 112
- Prior art, FTO, infringement and validity
- Support for qualified U.S. counsel
EPO Support
- Novelty and inventive step
- Problem-solution reasoning
- Claim amendments
- Examination-response support
- Support for European counsel
PCT
- International filing strategy
- National-phase practice
- Cross-border specification and claim adaptation
U.S. and European patent filings and legal positions requiring licensed counsel remain subject to review and approval by appropriately qualified practitioners.
THOUGHT LEADERSHIP
CrossVision IP · 跨域知见
Leo is the founder and principal author of CrossVision IP (跨域知见), a practitioner-focused professional publication covering cross-border intellectual property.
290+ original professional articles address U.S. patent prosecution, EPO practice, Chinese patent law, patent litigation and enforcement, FTO, cross-border e-commerce IP risk, international patent-policy developments, and AI and patent practice.
He also maintains a professional exchange community for foreign-related IP practitioners and cross-border businesses.
Training, Expert Review & Research
Professional Training
Invited to deliver training for government agencies, enterprise IP teams and professional service organizations.
Expert Review
Participates in government-organized expert review panels, project evaluations and professional consultations.
Research & Advisory
Has contributed to research and advisory projects involving overseas IP dispute response, U.S. Section 337 investigations and industry-specific overseas IP risk analysis.
TECHNICAL RANGE
Working Across Law and Technology
Leo's engineering background and patent practice have involved inventions across multiple technical fields where legal interpretation depends on accurate technical understanding. These are patent practice areas, not claims of specialist engineering qualification in every field.
Mechanical systemsElectromechanical productsElectrical engineeringCommunicationsOptoelectronicsIndustrial designConsumer productsManufacturing systemsBattery and energy technologiesElectronicsSoftware-related inventions
AI & PATENT PRACTICE
Applying Senior Patent Judgment to AI
Leo actively uses large language models and AI-assisted tools within professional patent workflows, including patent-document analysis, prior-art research support, claim-feature extraction, Office Action analysis, prosecution-history analysis, translation review and FTO assessment.
AI-generated outputs are evaluated against the original patent disclosure, actual claim language, cited prior art, prosecution records, applicable examination rules and technical evidence.
This work provides the professional foundation for Patent & IP Subject Matter Expertise for AI Training and Evaluation.
GLOBAL COLLABORATION
Independent Practice · Direct Expert Access
CrossVision IP is an independent professional practice based in Shenzhen, China. Engagements provide direct access to Leo's patent-domain expertise rather than routing substantive work through a large delivery team.
Who I Work With
AI companies and model teams · AI data and expert platforms · LegalTech companies · Expert networks and recruiters · Law firms and patent counsel · Corporate IP teams · Chinese patent agencies · Cross-border businesses
Engagements
Remote expert work · AI evaluation · Patent/IP SME projects · Project-based patent analysis · Consulting · Counsel-led backend support · Professional training
Chinese
Native
English
Professional working proficiency, with extensive experience reviewing and preparing English-language patent specifications, claims, Office Actions, legal authorities and professional correspondence.
Location
Shenzhen, China
Available for global remote collaboration.
WORK WITH LEO
Need Senior Patent Expertise for an AI or Cross-Border IP Project?
CrossVision IP works with organizations that require practitioner-level judgment in patent law, Chinese Patent Law and CNIPA practice, AI evaluation or complex cross-border patent analysis.