Keisen Associates is a Tokyo-based Japanese intellectual property law firm with a Philadelphia office, specializing in comprehensive patent, trademark, and design law services for international clients. The firm stands out for its bilingual English-Japanese team, deep expertise in Japan’s IP legal landscape, and commitment to providing seamless, cost-effective support for protecting intellectual property in Japan and beyond.
With a mission to serve as a wellspring of legal services, the firm leverages its highly skilled attorneys, patent agents, technical advisers, and translators to support business development, technology transfer, and international licensing. Their approach is particularly tailored to multinational companies, joint research collaborations, and clients requiring efficient navigation of Japan’s unique IP procedures and policies.
Services Offered
- Patent and Utility Models
- Reinstatement (Missed Deadlines)
- Trademarks (Madrid Protocol etc.)
- Industrial Designs
- Litigation
- Searches and Opinions
- Technology Scouting & Transfer
- PCT National Entry To Japan
- Prior Art Searches
- In-House Technical Translations
- International Licensing
- Legal Consultation for Business Development
- Accelerated Examination
- Divisional Applications
- Appeal to Final Rejection
- Post-Grant Challenges (Opposition, etc.)
- Patent Infringement Representation
- Copyright Law Services
- Plants, Livestock, and Trade Secrets Protection
The firm serves clients globally with offices in Tokyo and Philadelphia, offering services in both English and Japanese. Their active participation in international events like the INTA Annual Meeting highlights their engagement with global IP trends and client needs.
