#1 Brian J Slosson (Thomas More Society)
Serves this area from Chicago, IL (0 mi)
Call (312) 782-1680Patent Attorneys & Agents in Chicago, IL
The top-ranked patent attorneys and agents serving Chicago, IL are Brian J Slosson (Thomas More Society), Christopher P Neahring and Dennis M McWilliams (Barnes & Thornburg LLP). We list 2727 patent attorneys and agents serving Chicago, IL. 30 of the providers shown match an active record from U.S. Patent and Trademark Office, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Patent Attorneys & Agents serving Chicago, IL (Cook County). 2727 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked patent attorneys and agents for Chicago
#2 Christopher P Neahring
Serves this area from Chicago, IL (0 mi)Call (312) 451-8897#3 Dennis M McWilliams (Barnes & Thornburg LLP)
Serves this area from Chicago, IL (0 mi)Call (312) 214-4801#4 Harriet P Croke (U. S. EPA Region 5)
Serves this area from Chicago, IL (0 mi)Call (312) 353-4789#5 Jeffrey R Gray (Barnes & Thornburg LLP)
Serves this area from Chicago, IL (0 mi)Call (312) 214-4807#6 Julia G Rybakova
Serves this area from Chicago, IL (0 mi)Call (847) 612-2091#7 Mark John Nahnsen (Barnes & Thornburg LLP)
Serves this area from Chicago, IL (0 mi)Call (312) 357-1313#8 Michael A Carrillo (Barnes & Thornburg LLP)
Serves this area from Chicago, IL (0 mi)Call (312) 356-1313#9 Michael A. Febbo (Hewlett-Packard Company)
Serves this area from Chicago, IL (0 mi)Call (331) 214-6446#10 Thomas Joseph Donovan (Barnes & Thornburg LLP)
Serves this area from Chicago, IL (0 mi)Call (312) 214-8329
20 more providers serving this area
- Vangelis Economou (Economou IP Law), Chicago, IL (0 mi)
- Julie R Gunnigle (Cook County State's Attorney's Office), Chicago, IL (1 mi)
- Liam F Reardon, Chicago, IL (1 mi)
- Timothy M Cho, Chicago, IL (1 mi)
- Yingbo He, Chicago, IL (1 mi)
- Kelly M Acosta (Crown Steel Sales, Inc.), Chicago, IL (2 mi)
- Mario K Kasalo (Law Office of J. Nicolas Albukerk), Chicago, IL (2 mi)
- Phil B Cage, Chicago, IL (2 mi)
- Karina R Marciani (Nature's Fynd), Chicago, IL (2 mi)
- Raymond E Parks, Chicago, IL (2 mi)
- Alice C Su (Akzo Nobel Services Inc.), Chicago, IL (3 mi)
- Andrew W. Mills, Chicago, IL (3 mi)
- Angus C. Fung (SRAM, LLC), Chicago, IL (3 mi)
- Annette Michele McGarry (McGarry & McGarry, LLC), Chicago, IL (3 mi)
- Charles O. Busch (Greenberg Traurig, LLP), Chicago, IL (3 mi)
- Christopher L Hines (Norton Rose Fulbright), Chicago, IL (3 mi)
- Christopher M. Kurpinski (CCC Intelligent Solutions, Inc.), Chicago, IL (3 mi)
- Daniel G Zhang (Irwin IP LLC), Chicago, IL (3 mi)
- David A Frey (Klintworth & Rozenblat LLP), Chicago, IL (3 mi)
- David E Klick (University of Illinois at Chicago), Chicago, IL (3 mi)
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Frequently asked questions
How many patent attorneys and agents serve Chicago?
We list 2727 patent attorneys and agents serving Chicago, IL: 0 based there and 2727 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which patent attorneys and agents serve Chicago?
The top-ranked patent attorneys and agents serving Chicago, IL are Brian J Slosson (Thomas More Society), Christopher P Neahring, Dennis M McWilliams (Barnes & Thornburg LLP), Harriet P Croke (U. S. EPA Region 5) and Jeffrey R Gray (Barnes & Thornburg LLP). The full ranked list, with the official records each provider matched, is on this page.
Which patent attorneys and agents serving Chicago are verified against official records?
10 of the top 10 match an active official record: Brian J Slosson (Thomas More Society) (U.S. Patent and Trademark Office), Christopher P Neahring (U.S. Patent and Trademark Office), Dennis M McWilliams (Barnes & Thornburg LLP) (U.S. Patent and Trademark Office), Harriet P Croke (U. S. EPA Region 5) (U.S. Patent and Trademark Office) and Jeffrey R Gray (Barnes & Thornburg LLP) (U.S. Patent and Trademark Office), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
What is the difference between a patent attorney and a patent agent?
Both are registered with the USPTO to prepare and prosecute patent applications. Patent attorneys are also licensed lawyers and can handle litigation and other legal matters; agents cannot.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .