Illinois

Patent attorneys in Illinois

Illinois hosts 2,889 active patent practitioners registered with the USPTO Office of Enrollment and Discipline. Patent attorneys and patent agents can both prepare and file patent applications, but only patent attorneys can also offer legal advice on prosecution strategy, freedom-to-operate analyses, and infringement opinions in Illinois. Practitioners are concentrated across 20 cities, with the largest clusters in the metros listed below. Notable firms with multiple registered practitioners in the state include Arch & Lake LLP, Cook County States Attorneys Office, and McDonnell Boehnen Hulbert & Berghoff LLP.

Top cities in Illinois

All practitioners in Illinois

Marc R Levin

Reg. 58454

Patent attorney

Skokie, IL · 60077

847-677-0780

Mitchell J Levin

Reg. 51940

Patent attorney

Cook County States Attorneys Office

Chicago, IL · 60602

312-603-8626

Yuri Z Levin-Schwartz

Reg. 82477

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Russell Evan Levine

Reg. 32153

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-2466

Robin Sue Levine Stoller

Reg. 34505

Patent attorney

Common questions

Do I need a patent attorney based in Illinois?

No. Every USPTO-registered patent practitioner is licensed to file applications on behalf of inventors in any state, regardless of where the practitioner's office is. Choosing a Illinois-based practitioner can simplify in-person inventor signings, local meetings, and same-time-zone calls, but it is not a legal requirement.

How many patent attorneys are licensed in Illinois?

2,889 active USPTO-registered patent practitioners list a Illinois office address on the OEDCI roster. This includes both patent attorneys (who can also offer legal advice) and patent agents (who can prepare and file patents but not offer broader legal advice).

What is the difference between a patent attorney and a patent agent?

Both pass the USPTO Patent Bar and can prepare, file, and prosecute patent applications. Only patent attorneys also hold a state bar license, meaning they can additionally offer legal advice on infringement, licensing, and litigation strategy. Patent agents tend to charge less per hour and are common at large in-house IP departments.