#1Bret Joseph Petersen
Serves this area from MO
Patent Attorneys & Agents in Barton County, MO
The top-ranked patent attorneys and agents serving Barton County, MO are Bret Joseph Petersen, Derek P Martin (Martin & Associates, LLC) and Haiqian L. Hix (Leggett & Platt Incorporated). We list 5 patent attorneys and agents serving Barton County, MO. 5 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 Barton County, MO. 5 providers, 5 of the top 5 verified against federal or state records. Registry records checked on 2026-11-04.
Top 5 ranked patent attorneys and agents for Barton County
| # | Provider | Verified records | Based in | Phone |
|---|---|---|---|---|
| 1 | Bret Joseph Petersen | Registered to practice before the USPTO in patent matters#37417 | MO | (417) 388-0503 |
| 2 | Derek P Martin (Martin & Associates, LLC) | Registered to practice before the USPTO in patent matters#36595 | MO | (417) 319-6650 |
| 3 | Haiqian L. Hix (Leggett & Platt Incorporated) | Registered to practice before the USPTO in patent matters#76424 | MO | (417) 358-8131 |
| 4 | Paul D O'Brien (Leggett & Platt Incorporated) | Registered to practice before the USPTO in patent matters#42949 | MO | (417) 358-8131 |
| 5 | Gene B Kartchner | Registered to practice before the USPTO in patent matters#33140 | Carl Junction, MO (25 mi) | (417) 499-8701 |
#2Derek P Martin (Martin & Associates, LLC)
Serves this area from MO#3Haiqian L. Hix (Leggett & Platt Incorporated)
Serves this area from MO#4Paul D O'Brien (Leggett & Platt Incorporated)
Serves this area from MO#5Gene B Kartchner
Serves this area from Carl Junction, MO (25 mi)
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Frequently asked questions
How many patent attorneys and agents serve Barton County?
We list 5 patent attorneys and agents serving Barton County, MO: 0 based there and 5 serving it from nearby. 5 of the top 5 match an active federal or state record, checked on 2026-11-04.
Which patent attorneys and agents serve Barton County?
The top-ranked patent attorneys and agents serving Barton County, MO are Bret Joseph Petersen, Derek P Martin (Martin & Associates, LLC), Haiqian L. Hix (Leggett & Platt Incorporated), Paul D O'Brien (Leggett & Platt Incorporated) and Gene B Kartchner. The full ranked list, with the official records each provider matched, is on this page.
Which patent attorneys and agents serving Barton County are verified against official records?
5 of the top 5 match an active official record: Bret Joseph Petersen (U.S. Patent and Trademark Office), Derek P Martin (Martin & Associates, LLC) (U.S. Patent and Trademark Office), Haiqian L. Hix (Leggett & Platt Incorporated) (U.S. Patent and Trademark Office), Paul D O'Brien (Leggett & Platt Incorporated) (U.S. Patent and Trademark Office) and Gene B Kartchner (U.S. Patent and Trademark Office). 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
Lamar, Golden City, Liberal, Mindenmines, Lamar Heights, Iantha, Burgess, Irwin, Milford