Full-service intellectual property law firm based in Chicago.

Personal Attention. Customized Service.

At LS3, clients get the personal attention and customized service that larger law firms cannot provide. With its surgical approach to legal matters, LS3 provides only the precise legal services that each client requires. LS3’s goal is to create long-standing “partnerships” with its clients where LS3 measures success based on its clients’ success, and LS3’s unique combination of high-quality work product and highly-responsive, personalized client service has allowed LS3 to achieve that goal with an increasing number of innovative, high-tech clients.

We bring over 150 years of combined experience in every aspect of IP law.

Our Practices

  • LS3 has extensive experience assisting clients with patent preparation and prosecution in various technology areas, such as computer software, AI, SaaS and big data platforms, user interfaces, observability platforms, map generation, networking, financial transaction processing, wireless power, smart home functionality, audio streaming, processing, and control, telecommunications, medical devices, among many others.

  • Since its inception in 2015, LS3 has acted as lead counsel in several cases before several federal district courts, including the Northern District of Illinois, District of Delaware, Western and Eastern District of Texas, Central and Northern District of California, and Southern District of Indiana. LS3 has also acted as lead counsel in cases before the U.S. International Trade Commission (ITC) in Section 337 matters and has experience handling Federal Circuit and Supreme Court appeals.

  • LS3 has extensive experience in various post-grant proceedings before the Patent Trial and Appeal Board (PTAB), including inter partes reviews (IPRs), ex parte reexaminations, and Covered Business Method (CBM) reviews.

  • LS3’s attorneys have collectively provided clients with at least 150 clearance, non-infringement, and/or invalidity opinions, including more than 50 that involved formal written opinions. As with LS3’s prosecution work, these FTO opinions involved a wide range of technology areas.

  • LS3 has extensive experience assisting clients with drafting IP-related provisions in contracts, performing due diligence concerning IP assets, and advising and negotiating IP-related transactions and disputes.

  • LS3 has extensive experience assisting clients with protecting their trademarks, copyrights, and trade secrets. LS3 has successfully negotiated with adverse parties on these matters and has also acted as lead counsel in adversarial trademark proceedings before the Trademark Trial and Appeal Board (TTAB) and in federal district court.

  • “Many outside counsel believe they have all the answers and do not need or welcome input from others. LS3 is different. They are tenacious advocates, but remain open to new ideas and different viewpoints.”

    LS3 Client

  • “LS3 literally worked day and night to give us the very best chance of winning the case, which we did. It was an important victory for our company and they played a key role.”

    LS3 Client

  • “They are intelligent and quickly develop an understanding of highly technical issues that are so common in intellectual property matters.”

    LS3 Client

  • “LS3 is a refreshingly organic firm that from top to bottom really understands its audience. There is no weak link in their team.”

    LS3 Client

Let’s Work Together

We’re always looking for new opportunities.