#1Peter T Rasche (Synergetics, Inc.)
Serves this area from O'Fallon, MO (2 mi)
Patent Attorneys & Agents in O'Fallon, MO
The top-ranked patent attorneys and agents serving O'Fallon, MO are Peter T Rasche (Synergetics, Inc.), Raymond W Deppen and Timothy B McBride (Mastercard International Incorporated). We list 321 patent attorneys and agents serving O'Fallon, MO. 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 O'Fallon, MO (St. Charles County). 321 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 O'Fallon
#2Raymond W Deppen
Serves this area from O'Fallon, MO (2 mi)#3Timothy B McBride (Mastercard International Incorporated)
Serves this area from O'Fallon, MO (2 mi)#4Lloyd G Buchanan
Serves this area from Weldon Spring Heights, MO (5 mi)#5Martha Ann Michaels (Law Office of Martha A. Michaels)
Serves this area from St. Paul, MO (5 mi)#6Alan L Cassel
Serves this area from St. Peters, MO (6 mi)#7Michelle J Smith (Law Offices of Michelle Smith)
Serves this area from St. Peters, MO (6 mi)#8Paul D Markowitz (SunEdison Semiconductor LLC)
Serves this area from St. Peters, MO (6 mi)#9Benton J Bradshaw
Serves this area from Wildwood, MO (10 mi)#10Clayton T Larue
Serves this area from Wildwood, MO (10 mi)
20 more providers serving this area
- David J. Lanzotti, Wildwood, MO (10 mi)
- Earl R Schultz (Schultz and Associates LLP), Wildwood, MO (10 mi)
- James B Surber, Wildwood, MO (10 mi)
- Mark F Wachter (Mark F. Wachter, Esq.), Wildwood, MO (10 mi)
- Michael David Petzoldt (TransTek INC), Wildwood, MO (10 mi)
- Prema S. Karunanithi, MO
- Scott A Smith (Katalyst Surgical, LLC), Wildwood, MO (10 mi)
- Srinivasan R. Nagarajan, Wildwood, MO (10 mi)
- Steven D Heinrich, MO
- Ronald James Miller (Ronald J. Miller, Attorney At Law), Chesterfield, MO (11 mi)
- Verne A Luckow (The Intellectual Property Law Office of Verne A. Luckow, LLC), Chesterfield, MO (11 mi)
- Bruce T Atkins (Bruce T. Atkins Intellectual Property), MO
- Amanda J Carmany-Rampey (Monsanto Company), Chesterfield, MO (13 mi)
- Andrea P Denklau, Chesterfield, MO (13 mi)
- Charles Carroll McCloskey IV (Charles C. McCloskey, LLC), Chesterfield, MO (13 mi)
- Colleen N. Gray (Bunge), Chesterfield, MO (13 mi)
- David H Chervitz, Chesterfield, MO (13 mi)
- David J. Chi (Monsanto Company), Chesterfield, MO (13 mi)
- E Clifford Lawson (Monsanto Co), Chesterfield, MO (13 mi)
- Edward J Cargill (Bayer Crop Science), Chesterfield, MO (13 mi)
Request quotes
Frequently asked questions
How many patent attorneys and agents serve O'Fallon?
We list 321 patent attorneys and agents serving O'Fallon, MO: 0 based there and 321 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 O'Fallon?
The top-ranked patent attorneys and agents serving O'Fallon, MO are Peter T Rasche (Synergetics, Inc.), Raymond W Deppen, Timothy B McBride (Mastercard International Incorporated), Lloyd G Buchanan and Martha Ann Michaels (Law Office of Martha A. Michaels). The full ranked list, with the official records each provider matched, is on this page.
Which patent attorneys and agents serving O'Fallon are verified against official records?
10 of the top 10 match an active official record: Peter T Rasche (Synergetics, Inc.) (U.S. Patent and Trademark Office), Raymond W Deppen (U.S. Patent and Trademark Office), Timothy B McBride (Mastercard International Incorporated) (U.S. Patent and Trademark Office), Lloyd G Buchanan (U.S. Patent and Trademark Office) and Martha Ann Michaels (Law Office of Martha A. Michaels) (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 .