IP Legal Services

Shiga’s distinguished former JPO examiners with extensive experience provide unique perspective and support our clients in obtaining and enforcing their rights.


  • Infringement suit
  • Suit against appeal/Trial decision
  • Post-grant opposition
  • Trial for invalidation
  • Expert opinion
  • Copyright
  • Unfair competition
  • Customs seizure
  • Collection of evidence
  • Preparation of proof of inventions publicly known or on prior use


Advice from Former JPO Appeal Examiners and Examiners

Our patent attorneys, who served major roles in the JPO, merge their extensive practical experience and knowledge to guide you in obtaining and enforcing your rights.

Legal Advice from Attorneys-at-Law

Having been in numerous patent infringement litigations with all manner of IP issues, our litigation team comprises attorneys-at-law with a concentrated depth of expertise in litigation combined with our patent attorneys having forefront technical knowledge, keenly support our clients in enforcing their intellectual property rights and firmly defending your business from infringement by competitors.

Patent Attorneys Qualified to Represent Parties in Court in IP Litigation

Our litigation team consists of former JPO examiners, attorneys-at-law, and patent attorneys are experienced litigators qualified to represent parties in court in IP litigation.  With our core strength to handle sophisticated cases beyond technology, we optimize our team performance which leads the case to successful resolution.

Preventative Measures to Avoid Litigation

In order to minimize damages from litigation, our patent attorneys and attorneys-at-law provide clear and actionable advice from the onset when infringement of intellectual property right is suspected.  Our expert opinions are objective conclusions drawn by a project team of attorneys-at-law, patent attorneys and technical specialists.