Wisconsin

Patent attorneys in Wisconsin

Wisconsin hosts 724 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 Wisconsin. 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 Foley & Lardner LLP, Boardman & Clark, LLP, and Smith Keane LLP.

Top cities in Wisconsin

Milwaukee287 Madison145 Neenah30 Waukesha22 Middleton22 Brookfield18 Wauwatosa17 Racine17 Appleton9 Hudson8 Hartland6 Mequon5 Elm Grove5 Germantown4 Oshkosh4 Eau Claire3 Waunakee3 Verona3 Shorewood3 La Crosse3

All practitioners in Wisconsin

Erica J. Liabo-VanDerPol

Reg. 72652

Patent attorney

Boardman & Clark, LLP

Madison, WI · 53703

608-257-9521

Jordan A Liff

Reg. 80700

Patent attorney

Smith Keane LLP

Hartland, WI · 53029

262-563-1438

Patricia A Limbach

Reg. 50295

Patent attorney

Ryan Kromholz and Marion

Milwaukee, WI · 53226

262-783-1300

Keith D Lindenbaum

Reg. 40365

Patent attorney

Foley & Lardner LLP

Milwaukee, WI · 53217

414-297-5772

Jeffrey D Lindsay

Reg. 41155

Patent agent

Planet Lindsay, LLC

Appleton, WI · 54915

920-257-7347

Christopher R. Liro

Reg. 70399

Patent attorney

Andrus Intellectual Property Law, LLP

Milwaukee, WI · 53202

414-271-7590

Xiaohong Liu

Reg. 64859

Patent attorney

Waunakee, WI · 53703-1482

203-668-4998

Craig J Loest

Reg. 48557

Patent attorney

Kohler Co.

Kohler, WI · 53044

920-457-4441

Jeffrey R Lomprey

Reg. 55401

Patent attorney

Foley & Lardner LLP

Madison, WI · 53701-1497

608-258-4288

Theodore James Long

Reg. 20648

Patent attorney

Boardman & Clark LLP

Madison, WI · 53701-0927

608-257-9521

Timothy C Loose

Reg. 64780

Patent agent

BRISTOL, WI · 53104

773-759-8709

Daniel M. Lorentzen

Reg. 71348

Patent attorney

Genus, plc

DeForest, WI · 53532

608-316-0541

James Earl Lowe· Jr

Reg. 30402

Patent attorney

James Lowe Law

New Berlin, WI · 53151

414-427-0298

Sheila M Luck

Reg. 33009

Patent attorney

Connecting Choices, LLC

Scandinavia, WI · 54977

920-284-8562

David G Luettgen

Reg. 39282

Patent attorney

Foley & Lardner LLP

Milwaukee, WI · 53202

414-297-5769

Zhaohui Luo

Reg. 59046

Patent attorney

Law Office of Zhaohui Luo

Wauwatosa, WI · 53213

414-375-2312

Thomas J Lyneis

Reg. 80602

Patent attorney

Godfrey & Kahn, S.C.

Milwaukee, WI · 53202-5615

414-287-9646

Yanjun Ma

Reg. 79360

Patent agent

DeWitt LLP

Madison, WI · 53703

608-252-9200

Caitlin E. Mac Nair

Reg. 76902

Patent agent

Sun Praine, WI · 53590

608-770-4180

Ethel R. Machi

Reg. 67482

Patent agent

Elm Grove, WI · 53122

262-844-4240

Peter V. Machi

Reg. 67483

Patent attorney

Law Offices of Valenti & Machi

Wauwatosa, WI · 53226

414-207-4332

Michael J Major

Reg. 63817

Patent agent

University of Wisconsin

Madison, WI · 53706

608-262-2240

Brian M Mancini

Reg. 39288

Patent attorney

Sturgeon Bay, WI · 54235

920-737-4928

John M Manion

Reg. 38957

Patent attorney

Ryan Kromholz & Manion, S.C.

Brookfield, WI · 53045

262-783-1300

Michelle Manning

Reg. 50592

Patent attorney

Bell & Manninng, LLC

Madison, WI · 53713

608-661-3592

Gottlieb John Marmet

Reg. 67634

Patent attorney

von Briesen & Roper, s.c

Milwaukee, WI · 53202

414-287-1533

Christopher F. Marotta

Reg. 71048

Patent attorney

Madison, WI · 53703

954-235-6020

Jeffrey A Marx

Reg. 56977

Patent attorney

Epic Systems Corporation

Verona, WI · 53593

608-271-9000

Brant T Maurer

Reg. 53285

Patent attorney

S.C. Johnson & Son, Inc.

Racine, WI · 53403-2236

262-260-4342

Michael M. Maurer

Reg. 80366

Patent agent

Foley and Lardner LLP

Milwaukee, WI · 53202

414-297-5171

Common questions

Do I need a patent attorney based in Wisconsin?

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 Wisconsin-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 Wisconsin?

724 active USPTO-registered patent practitioners list a Wisconsin 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.