Hans R. Troesch provides comprehensive strategic counsel to clients ranging from individual inventors and startups to large public companies, focusing on artificial intelligence and machine learning algorithms, infrastructures, and applications, data science, computer- and software-implemented inventions, and social networks.

A founding partner and former managing principal of Fish & Richardson’s Silicon Valley office, Hans draws on his 40 years of experience as an IP attorney — including 30 years focusing on patent practice, with further experience as an IP litigation partner and business lawyer — to provide support for the full range of his clients’ intellectual property needs, guiding them in patent portfolio development and IP strategy with a view to building value for the business. 

Hans manages portfolios of patents and patent applications, helps clients identify patentable inventions, prepares and supervises the preparation and prosecution of patent applications for filing both in the U.S. and internationally, and develops strategies for building commercially valuable patent portfolios. He is practiced in identifying patentable inventions, running invention harvesting and brainstorming, and interviewing inventors and patent examiners.

Clients also rely on Hans for counsel on infringement and validity of patents; IP due diligence in connection with mergers and acquisitions; and litigation and licensing of patents, copyrights, and trade secrets. His practice covers a wide range of computer-related technologies, and he has substantial patent experience in: 

  • Artificial intelligence algorithms and infrastructure 
  • Machine learning, machine translation, and natural language processing 
  • Data science 
  • Distributed system and network architectures 
  • Internet and client-server systems, including mobile clients 
  • Image processing 
  • Social networks 
  • Blockchain systems 

In his active pro bono practice, Hans serves regularly with the San Diego Volunteer Legal Program’s Eviction Clinic, where he provides legal advice to low-income tenants facing eviction or other housing concerns. 

Hans is a hereditary member of a medieval baker's guild in Bern, die Gesellschaft zu Pfistern, which dates back to 1341. His Erdős number is five. 


  • “Applied Data Science with Python,” University of Michigan Course Certificate issued by Coursera (February 12, 2023) 
  • Python 3 Programming,” University of Michigan Course Certificate issued by Coursera (September 22, 2022)