#1Andrew J Mayer
Serves this area from Downers Grove, IL (1 mi)
Patent Attorneys & Agents in Downers Grove, IL
The top-ranked patent attorneys and agents serving Downers Grove, IL are Andrew J Mayer, Chadwick A Sullivan (Dover Corporation) and Felipe Hernandez Jr. (P3ip). We list 2470 patent attorneys and agents serving Downers Grove, 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 Downers Grove, IL (DuPage County). 2470 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 Downers Grove
#2Chadwick A Sullivan (Dover Corporation)
Serves this area from Downers Grove, IL (1 mi)#3Felipe Hernandez Jr. (P3ip)
Serves this area from Downers Grove, IL (1 mi)#4John P Cooney (Cooney Corso & Moynihan LLC)
Serves this area from Downers Grove, IL (1 mi)#5Joseph DiSalvo (Information & Patent Services, LLC)
Serves this area from Downers Grove, IL (1 mi)#6Joseph P Krause (Kelly & Krause, LTD)
Serves this area from Downers Grove, IL (1 mi)#7Leonard Edward Murphy (Property Loss Research Bureau)
Serves this area from Downers Grove, IL (1 mi)#8Lindsay K Eastman (Glanbia Performance Nutrition)
Serves this area from Downers Grove, IL (1 mi)#9Paul J. Kolbeck
Serves this area from Downers Grove, IL (1 mi)#10Adam R Andrea
Serves this area from Downers Grove, IL (2 mi)
20 more providers serving this area
- Thomas J. Loos, Downers Grove, IL (2 mi)
- Vani Vedam, Downers Grove, IL (2 mi)
- Wassim Mahrouka, Downers Grove, IL (2 mi)
- Gaurav K Mohindra (Mohindra Law Group P.C.), Westmont, IL (3 mi)
- Timothy E Hoerman (Timothy E. Hoerman, Ltd.), Westmont, IL (3 mi)
- Vaibhav Sawhney, Westmont, IL (3 mi)
- Danielle M Beach, Clarendon Hills, IL (3 mi)
- Aleksas D. Siliunas, Lisle, IL (3 mi)
- Clarence R Moon III, Lisle, IL (3 mi)
- Daniel Joseph Deneufbourg (CTS Corporation), Lisle, IL (3 mi)
- David Paul Yusko (INEOS USA LLC), Lisle, IL (3 mi)
- Dnyanesh S Patkar (Infosys Technologies LTD), Lisle, IL (3 mi)
- Erin E Chapman (First Trust Portfolios L. P.), Lisle, IL (3 mi)
- Gilsoo Lee, Lisle, IL (3 mi)
- Jack David Nimz (Navistar, Inc.), Lisle, IL (3 mi)
- James A O'Malley (Molex, LLC), Lisle, IL (3 mi)
- Jefferson Fizer Perkins (Perkins IP Law Group LLC), Lisle, IL (3 mi)
- Jeffrey K Jacobs (Molex), Lisle, IL (3 mi)
- Mark C Bach (NAVISTAR, INC.), Lisle, IL (3 mi)
- Mark C Harbeck, Lisle, IL (3 mi)
Request quotes
Frequently asked questions
How many patent attorneys and agents serve Downers Grove?
We list 2470 patent attorneys and agents serving Downers Grove, IL: 0 based there and 2470 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 Downers Grove?
The top-ranked patent attorneys and agents serving Downers Grove, IL are Andrew J Mayer, Chadwick A Sullivan (Dover Corporation), Felipe Hernandez Jr. (P3ip), John P Cooney (Cooney Corso & Moynihan LLC) and Joseph DiSalvo (Information & Patent Services, LLC). The full ranked list, with the official records each provider matched, is on this page.
Which patent attorneys and agents serving Downers Grove are verified against official records?
10 of the top 10 match an active official record: Andrew J Mayer (U.S. Patent and Trademark Office), Chadwick A Sullivan (Dover Corporation) (U.S. Patent and Trademark Office), Felipe Hernandez Jr. (P3ip) (U.S. Patent and Trademark Office), John P Cooney (Cooney Corso & Moynihan LLC) (U.S. Patent and Trademark Office) and Joseph DiSalvo (Information & Patent Services, LLC) (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 .