#1Martha Ann Michaels (Law Office of Martha A. Michaels)
Serves this area from St. Paul, MO (21 mi)
Patent Attorneys & Agents in Calhoun County, IL
The top-ranked patent attorneys and agents serving Calhoun County, IL are Martha Ann Michaels (Law Office of Martha A. Michaels), Joseph M. Ellsworth and Raymond J. Whitehill II (Pontello, Bressler, Norwood, and Associates). We list 14 patent attorneys and agents serving Calhoun County, IL. 14 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 Calhoun County, IL. 14 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 Calhoun County
#2Joseph M. Ellsworth
Serves this area from MO#3Raymond J. Whitehill II (Pontello, Bressler, Norwood, and Associates)
Serves this area from MO#4Sandeep Kumar
Serves this area from MO#5Alan L Cassel
Serves this area from St. Peters, MO (25 mi)#6Michelle J Smith (Law Offices of Michelle Smith)
Serves this area from St. Peters, MO (25 mi)#7Paul D Markowitz (SunEdison Semiconductor LLC)
Serves this area from St. Peters, MO (25 mi)#8Peter T Rasche (Synergetics, Inc.)
Serves this area from O'Fallon, MO (29 mi)#9Raymond W Deppen
Serves this area from O'Fallon, MO (29 mi)#10Timothy B McBride (Mastercard International Incorporated)
Serves this area from O'Fallon, MO (29 mi)
4 more providers serving this area
- Bruce T Atkins (Bruce T. Atkins Intellectual Property), MO
- Prema S. Karunanithi, MO
- Steven D Heinrich, MO
- Lloyd G Buchanan, Weldon Spring Heights, MO (32 mi)
Request quotes
Frequently asked questions
How many patent attorneys and agents serve Calhoun County?
We list 14 patent attorneys and agents serving Calhoun County, IL: 0 based there and 14 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 Calhoun County?
The top-ranked patent attorneys and agents serving Calhoun County, IL are Martha Ann Michaels (Law Office of Martha A. Michaels), Joseph M. Ellsworth, Raymond J. Whitehill II (Pontello, Bressler, Norwood, and Associates), Sandeep Kumar and Alan L Cassel. The full ranked list, with the official records each provider matched, is on this page.
Which patent attorneys and agents serving Calhoun County are verified against official records?
10 of the top 10 match an active official record: Martha Ann Michaels (Law Office of Martha A. Michaels) (U.S. Patent and Trademark Office), Joseph M. Ellsworth (U.S. Patent and Trademark Office), Raymond J. Whitehill II (Pontello, Bressler, Norwood, and Associates) (U.S. Patent and Trademark Office), Sandeep Kumar (U.S. Patent and Trademark Office) and Alan L Cassel (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 .
Communities served
Hardin, Kampsville, Batchtown, Brussels, Hamburg