Intellectual Property Law

Chicago patent attorneys, trademarks attorneys, and patent agents specializing in intellectual property law (patents, trademarks, copyrights, trade secrets and unfair competition)


Experienced with highly complex intellectual property litigation and highly complex prosecution. 


Hallihan IP Partners, LLC
Phone 312-784-3000


Hallihan IP Partners, LLC. is a Chicago based intellectual property law firm comprised of registered patent attorneys and trademark attorneys that have many years of experience.  Each member of our team is an experienced professional having a medical, scientific, software, or engineering degree.  Several have advanced degrees.  Each has experience working in the medical, scientific, software or engineering fields.  The language skills of our team include French and Japanese.   

Based in Chicago, our intellectual property attorneys have counseled clients throughout Illinois, Wisconsin, Missouri, Iowa, Minnesota, and the rest of the Midwest; Texas and other parts of the United States; and around the world.  Some of our attorneys have a track record of success representing patent defendants in the notoriously plaintiff friendly Eastern District of Texas (Beaumont, Tyler and Lufkin). 


We counsel clients on patent, trademark, copyright, trade secret, and unfair competition law, along with entertainment, Internet, computer law, and domain name issues.  We are experienced practicing before the US patent and trademark office, various state and federal courts and the US International Trade Commission (ITC).  Our IP specialists have significant experience with highly complex intellectual property litigation and highly complex patent and trademark prosecution.  

Although modest in size, we offer as good or better quality work than many larger firms, more flexibility, and a more affordable price.  This is due, in part, because each of our intellectual property specialists has many years of experience.  On each project, our philosophy is to complete it in the most cost efficient manner.  On litigations and other larger projects, we often team with other modest size specialty law firms to ensure superior experienced staffing, while remaining cost efficient.