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Long River International Patent Trademark & Law Office


Long River International Patent & Trademark Office is led by Patent Lin, the firm’s director, vice director Frank Chen and Der-Ming Hou, each of whom are representative partners. The firm boasts teams of patent engineers, patent attorneys, lawyers and a biological and pharmaceutical group. It is noted for its work in patent and trademark applications and maintenance; it also provides assistance in other legal matters, including unfair competition, protection of trade secrets and corporate law matters. In the past year, its Beijing office merged with a Chinese law firm and changed its name to Beijing Tongjun Law Firm. 

With over forty years of experience and technical expertise, Long River International Patent & Trademark Office offers:


• IP Prosecution

• IP Litigation

• IP Due Diligence

• IP Right Maintenance

• IP Enforcement

• IP Valuation

• Other Legal Services

IP Experts


3F, No. 176, Sing Ai Rd., Neihu District, Taipei 114, Taiwan






Contact Person:

Achen Lin