Missouri

Patent attorneys in Missouri

Missouri hosts 666 active patent practitioners registered with the USPTO Office of Enrollment and Discipline. Patent attorneys and patent agents can both prepare and file patent applications, but only patent attorneys can also offer legal advice on prosecution strategy, freedom-to-operate analyses, and infringement opinions in Missouri. Practitioners are concentrated across 20 cities, with the largest clusters in the metros listed below. Notable firms with multiple registered practitioners in the state include Armstrong Teasdale LLP, Shook, Hardy & Bacon, and Thompson Coburn LLP.

Top cities in Missouri

All practitioners in Missouri

Megan M. Usovsky

Reg. 72923

Patent attorney

Columbia, MO · 65203

573-999-1558

Thomas H Van Hoozer

Reg. 32761

Patent attorney

Kansas City, MO · 64155-8534

816-734-4453

Michael J Vander Molen

Reg. 57274

Patent attorney

Armstrong Teasdale LLP

St. Louis, MO · 63105-1847

314-259-4734

Marc W Vander Tuig

Reg. 57964

Patent attorney

Armstrong Teasdale LLP

St. Louis, MO · 63105

314-259-4798

Catherine E. VanEngelen

Reg. 71086

Patent agent

Washington University

St. Louis, MO · 63110

314-747-0927

Michael R. VanEngelen

Reg. 77375

Patent agent

Bayer Crop Science

Chesterfield, MO · 63017

973-254-5000

Sarah Pfeifer Vaz

Reg. 34747

Patent attorney

Town & Country, MO · 63017

908-252-9295

Matthew G Voas

Reg. 75090

Patent agent

Hughes, Hubbard and Reed

Kansas City, MO · 64108-2663

816-709-4112

Paul M Vogel

Reg. 74774

Patent attorney

Shook, Hardy & Bacon

Kansas City, MO · 64108

816-474-6550

Benjamin L Volk· Jr

Reg. 48017

Patent attorney

Thompson Coburn LLP

Saint Louis, MO · 63101

314-552-6272

Mary V Vollmar

Reg. 81678

Patent agent

O'Fallon, MO · 63368

314-365-6590

Mark F Wachter

Reg. 27243

Patent attorney

Mark F. Wachter, Esq.

Wildwood, MO · 63005-8409

314-610-4257

Benjamin Gabriel Walczak

Reg. 67438

Patent attorney

Saint Louis, MO · 63101

414-510-7627

Catherine W Wall

Reg. 42209

Patent attorney

Polster Lieder Woodruff and Lucchesi, LC

Saint Louis, MO · 63131-3615

314-238-2400

John T. Wall

Reg. 84128

Patent agent

Student

Brentwood, MO · 63144

314-960-0111

Joseph E Walsh· Jr

Reg. 36959

Patent attorney

Harness, Dickey & Pierce, PLC

St. Louis, MO · 63105

314-726-7510

Nathan C Walters

Reg. 52338

Patent attorney

Ellisville, MO · 63021

636-527-1794

Agnelo J. Wang

Reg. 61988

Patent attorney

St. Louis, MO · 63141

314-432-5656

Qing Wang

Reg. 56485

Patent agent

Gates Ag One

St. Louis, MO · 63108

314-548-3189

Douglas Eugene Warren

Reg. 52344

Patent attorney

The Law Office of Douglas E. Warren, LLC

Steelville, MO · 65565

636-519-5257

B Trent Webb

Reg. 40865

Patent attorney

Shook Hardy & Bacon, LLP

Kansas City, MO · 64108

816-474-6550

Connor J Webb

Reg. 76995

Patent attorney

Shook, Hardy & Bacon

Kansas City, MO · 64108

816-559-2585

Andrew C Wegman

Reg. 54530

Patent attorney

Senniger Powers LLP

St. Louis, MO · 63102

314-345-7000

Zachary J. Wegmann

Reg. 74046

Patent attorney

Bryan Cave Leighton Paisner LLP

Saint Louis, MO · 63102

314-259-2640

Alex D. Weidner

Reg. 76397

Patent attorney

Thompson Coburn LLP

St. Louis, MO · 63101

314-552-6333

Evan J Weidner

Reg. 78455

Patent attorney

Shook, Hardy & Bacon LLP

Kansas City, MO · 64108

816-223-9705

Robert W Welsh

Reg. 31687

Patent attorney

Welsh IP Strategies, LLC

St. Louis, MO · 63131

314-805-7788

William Charles West

Reg. 75401

Patent attorney

West Law Office LLC

Kansas City, MO · 64148

913-244-5767

J David Wharton

Reg. 25717

Patent attorney

Stinson Morrison Hecker LLP

Kansas City, MO · 64106

816-842-8600

Bryan K Wheelock

Reg. 31441

Patent attorney

Harness, Dickey & Pierce, P.L.C.

St Louis, MO · 63105

314-726-7505

Common questions

Do I need a patent attorney based in Missouri?

No. Every USPTO-registered patent practitioner is licensed to file applications on behalf of inventors in any state, regardless of where the practitioner's office is. Choosing a Missouri-based practitioner can simplify in-person inventor signings, local meetings, and same-time-zone calls, but it is not a legal requirement.

How many patent attorneys are licensed in Missouri?

666 active USPTO-registered patent practitioners list a Missouri office address on the OEDCI roster. This includes both patent attorneys (who can also offer legal advice) and patent agents (who can prepare and file patents but not offer broader legal advice).

What is the difference between a patent attorney and a patent agent?

Both pass the USPTO Patent Bar and can prepare, file, and prosecute patent applications. Only patent attorneys also hold a state bar license, meaning they can additionally offer legal advice on infringement, licensing, and litigation strategy. Patent agents tend to charge less per hour and are common at large in-house IP departments.