In litigation




 Business Litigation | Commercial Litigation

Intellectual Property Litigation

Winthrop & Weinstine represents their clients in a full range of intellectual property litigation matters including patent, copyright, trademark, trade secret, and unfair competition cases, as well as matters involving cybersquatting and domain name disputes. Our attorneys work to understand the client’s business so that litigation strategy is aligned with the client’s business objectives and matters are handled effectively and cost-effectively.

Patent Litigation
Our attorneys know from decades of experience, how to evaluate the asserted patent, the accused product or process and the prior art, and develop a winning approach. Our attorneys have successfully tried patent cases to juries in courts around the nation. Our attorneys have handled patent infringement cases covering a wide array of technologies including computer hardware and software, communication networks, pharmaceuticals, nutritional supplements, medical devices, surgical equipment, chemical processes, business methods, construction safety devices, and snowmobile equipment.

Our attorneys think it is important to work with the client at the outset to identify exactly what is at stake in the case. Once the business risks and rewards are identified, our attorneys work with the client to develop a litigation team, strategy and budget that are appropriate to the needs of the case. Our attorneys collaborate with the client to develop a case theory that is coherent, consistent and persuasive to judge and jury. Our attorneys combine courtroom skills with a deep understanding of patent law and the technology at issue.

Trademark Litigation
Our attorneys have brought and defended against numerous lawsuits involving allegations of trademark infringement. Our attorneys have developed a comprehensive body of experience and knowledge concerning the Lanham Act and related state statutes, including the Minnesota Deceptive Trade Practices Act, which can be quickly brought to bear in either prosecuting or defending against trademark infringement claims. Our attorneys assist clients in developing trademark strategies which involve coordinating trademark registration and litigation activities with the client’s business objectives so that trademark litigation, if necessary, effectively protects the client’s intellectual property while serving its business needs. Our attorneys also practice before the Trademark Trial & Appeal Board and have actual and extensive litigation experience in TTAB proceedings.

Copyright Litigation
Our attorneys have represented clients as plaintiffs and defendants in many copyright infringement cases around the country. Our attorneys have litigated copyright cases involving musical compositions, sculptural works, architectural designs and examination questions. Our attorneys have been active in developing new theories to protect the copyrights of diverse clients such as home-builders and construction companies. Our attorneys have extensive experience using copyright and other legal tools to protect questions used in licensure and certification examinations, to maintain exam security and to stop exam subversion.

Trade Secret, Unfair Competition & Non-Compete Litigation
Our attorneys also prosecute and defend claims of trade secret misappropriation, unfair competition, and breach of non-compete or confidentiality agreements. We have frequently either obtained an injunction or successfully resisted the issuance of an injunction in these cases. Our attorneys have litigated these issues in the insurance, banking, securities, health care and financial services industries, and in the context of technologies including computer software, disk drives, medical devices, examination content, and paper products.





Stephen R. Baird
p  (612) 604-6585 
f   (612) 604-6985 
Tiffany A. Blofield
p  (612) 604-6684 
f   (612) 604-6884 
Thomas H. Boyd
p  (612) 604-6505 
f   (612) 604-6805 
Tucker A. Chambers
p  (612) 604-6586 
f   (612) 604-6976 
David A. Davenport
p  (612) 604-6716 
f   (612) 604-6816 
Michelle E. Dawson
p  (612) 604-6391 
f   (612) 604-6991 
Erin O. Dungan
p  (612) 604-6579 
f   (612) 604-6979 
Lisa B. Ellingson
p  (612) 604-6573 
f   (612) 604-6973 
Martha J. Engel
p  (612) 604-6470 
f   (612) 604-6870 
Brett A. Klein
p  (612) 604-6392 
f   (612) 604-6992 
Craig S. Krummen
p  (612) 604-6717 
f   (612) 604-6917 
Justice Ericson Lindell
p  (612) 604-6431 
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Britta S. Loftus
p  (612) 604-6543 
f   (612) 604-6953 
Brent A. Lorentz
p  (612) 604-6481 
f   (612) 604-6981 
William A. McNab
p  (612) 604-6652 
f   (612) 604-6852 
Michael T. Olsen
p  (612) 604-6718 
f   (612) 604-6818 
Devan V. Padmanabhan
p  (612) 604-6748 
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David P. Pearson
p  (612) 604-6692 
f   (612) 604-6892 
Brooks F. Poley
p  (612) 604-6619 
f   (612) 604-6819 
Sri K. Sankaran
p  (612) 604-6753 
f   (612) 604-6953 
Nadeem W. Schwen
p  (612) 604-6456 
f   (612) 604-6959 
Bradley J. Walz
p  (612) 604-6725 
f   (612) 604-6825 
Robert R. Weinstine
p  (612) 604-6613 
f   (612) 604-6813 
Richelle A. Wendorf
p  (612) 604-6744 
f   (612) 604-6944 
Christopher A. Young
p  (612) 604-6711 
f   (612) 604-6911 

August 08, 2016
Brent Lorentz Interviewed on WCCO News and Views with Roshini Rajkumar

August 01, 2016
Attorney Brent Lorentz Interviewed by Fox 9 News

August 30, 2013
Bradley J. Walz Profiled in St. Thomas Lawyer

October 22, 2012
Stephen R. Baird Discusses Role of Social Media in Trademark Bullying Disputes

July 23, 2012
"Let It Slide: Copyright Infringement On Pinterest," Catlan McCurdy Authors Article in Law360

June 30, 2012
Stephen R. Baird Discusses Claims of “Trademark Bullying”

January 02, 2012
Video: Hot Marketing Topics with Trademark & Legal Implications

December 27, 2011
Preparing for Cloud Computing: Bradley J. Walz in "Tech Toolkit" in Finance & Commerce

December 13, 2011
Bradley J. Walz Suggests Money is Motive for Debated Changes in IP Law

October 20, 2011
Opt-Out Protection for Registered Trademarks in New Domain Space

August 03, 2011
Susan A. Perera's "Protecting Your Color Trademark" Published on IP Law 360

July 25, 2011
"Exposing Two-Face Brands" by Stephen R. Baird Featured on World Trademark Review

July 22, 2011
IP Attorney Michael T. Olsen Shares Best Practices for Maximizing IP Assets

July 06, 2011
Video: Stephen R. Baird's Trademark & Brand Talk

June 24, 2011
Stephen R. Baird Discusses Wiper Fluid Lawsuit in Local Business Journal

June 16, 2011
"Taste Infrigement" by Stephen R. Baird Appears in iP Frontline

May 09, 2011
Trademark Attorney Daniel J. Kelly Article Featured in Law360

February 08, 2011
Article by Stephen R. Baird & Susan A. Perera Featured in Minnesota Business

November 12, 2010
Minneapolis/St. Paul Business Journal Features Stephen R. Baird, DuetsBlog in Nov. 12 Edition

July 31, 2010
Bradley J. Walz Comments on Leeds Lawsuit Against Olympus in Biz Journal Article

July 13, 2010
Bradley J. Walz Discusses Licensing, Franchising in Minneapolis/St. Paul Business Journal

June 07, 2010
Bradley J. Walz Guest Blogs About Social Media on TECHdotMN

May 17, 2010
Article by Bradley J. Walz Featured in Upsize Magazine

April 09, 2010
"Describing Your Brand Can Lead to Legal Troubles" - by Stephen R. Baird

January 19, 2010
"Be Careful When Updating Your Firm's Trademark" - Bradley J. Walz

November 30, 2009
Intellectual Property's DuetsBlog Makes a "Splash"

November 17, 2009
Stephen R. Baird Discusses "Trademarking" in Upsize

November 13, 2009
Legal Implications of Branding - Stephen R. Baird

November 09, 2009
Stephen R. Baird's "A Trademark Touch" Cover Story for Brand Packaging Magazine

October 12, 2009
Stephen R. Baird Adapted Blog Post a Featured Article for Thomson Reuters Newsletter

October 12, 2009
Stephen R. Baird Blog Post Featured on ipFrontline

September 21, 2009
Webinar: What Trademark Lawyers Need to Understand About In Re Bose

August 11, 2009
Bradley J. Walz Blog Post Featured Article on ipFrontline

July 23, 2009
Stephen R. Baird's Blog Post Featured on

May 06, 2009
Presentations from Law Firm Alliance 2009 Spring Meeting

April 20, 2009
Presentation from “From the Cocktail Napkin to Copyrights”

March 30, 2009
Stephen R. Baird Interview on

January 12, 2009
Three Attorneys Featured in Upsize

January 01, 2009
How-To Audio: Stephen R. Baird Discusses Intellectual Property

December 22, 2008
Stephen R. Baird Featured in Iowa Law E-Newsletter

July 21, 2008
Winthrop & Weinstine Trademark Case Featured in Star Tribune

May 09, 2008
Stephen R. Baird Presents TTAB Rule Changes (Presentation)

May 08, 2008
Stephen R. Baird Presents TTAB's Tough Stance on Fraud (Presentation)

May 01, 2008
Stephen R. Baird Featured in Alma Matter Newsletter

July 01, 2007
"Look Before You Leap!" - Stephen R. Baird

May 01, 2007
"Do I Really Need to Register My Name and Logo? The Short Answer: Really!" - Stephen R. Baird

January 01, 2007
"What's in a Brand? More than Just a Name!" - Stephen R. Baird

May 20, 2006
“2005 Trademark Decisions of the Federal Circuit” – Stephen R. Baird

May 01, 2006
Stephen R. Baird Featured on TTABlog

January 01, 2006
"Discovering the Lesser Known Alternative Dispute Resolution Processes to Resolve Intellectual Property Disputes" - Bradley J. Walz

Client Alerts
Press Releases

June 13, 2017
Winthrop & Weinstine Attorneys Recognized as “IP Stars” by National Publication

May 23, 2017
Winthrop & Weinstine Attorneys Recognized for 2016 Pro Bono Service

May 22, 2017
Brad Walz Appointed to Board of Directors of Little Free Library

March 20, 2017
Baird, Engel and Anderson Honored With JD Supra “Reader’s Choice” Awards

January 30, 2017
Trademark & Brand Management Practice Recognized by 2017 World Trademark Review 1000

December 12, 2016
Winthrop & Weinstine Welcomes Eight New Associates

August 15, 2016
Twenty-Six Winthrop & Weinstine Attorneys Named to 2017 “Best Lawyers In America” List

June 03, 2016
Winthrop & Weinstine Attorneys Recognized as “IP Stars” by National Publication

November 12, 2015
Winthrop & Weinstine Continues to Grow With the Hiring of Five New Associates

May 20, 2015
Winthrop & Weinstine Attorneys Recognized as "IP Stars" by National Publication

February 02, 2015
Winthrop & Weinstine Welcomes New Attorney Wesley Anderson

January 23, 2015
Martha Engel Named “Young Engineer of the Year” by American Society of Mechanical Engineers

January 12, 2015
Winthrop & Weinstine, P.A., Announces New Shareholders and Associates

July 01, 2014
Winthrop & Weinstine Adds Six Attorneys To Growing Firm Roster

June 05, 2014
Winthrop & Weinstine Attorneys Recognized as "IP Stars" by National Publication

January 02, 2014
Winthrop & Weinstine, P.A., Announces New Shareholders and Associates

December 10, 2013
Three Winthrop & Weinstine Lawyers Named Minnesota “Attorneys of the Year”

July 08, 2013
Super Lawyers® Names Fourteen to Rising Stars List

July 08, 2013
Twenty-Four Attorneys Named as Super Lawyers®

June 10, 2013
Winthrop & Weinstine Attorneys Recognized as “IP Stars” by National Publication

February 21, 2013
Thomas H. Boyd, Shareholder at Winthrop & Weinstine, P.A., Named as One of the “Attorneys of the Year”

January 01, 2013
Winthrop & Weinstine, P.A., Announces New Shareholders and Associates

July 09, 2012
Twenty-Three Winthrop & Weinstine Attorneys Named as Super Lawyers®

July 09, 2012
Thirteen Winthrop & Weinstine Attorneys on Super Lawyers®-Rising Stars List 2012

February 29, 2012
Michelle E. Dawson Joins Intellectual Property Department at Winthrop & Weinstine

February 29, 2012
Brett A. Klein Joins Intellectual Property Department at Winthrop & Weinstine

February 29, 2012
Nathan J. Witzany Joins Intellectual Property Department at Winthrop & Weinstine

January 31, 2012
Prominent Patent & IP Attorneys Join Winthrop & Weinstine

January 30, 2012
Paul J. Robbennolt Joins Winthrop & Weinstine's IP Department

January 30, 2012
Devan V. Padmanabhan, Patent Attorney, Joins Winthrop & Weinstine

January 17, 2012
Winthrop & Weinstine Announces 2012 Board of Directors

December 20, 2011
Stephen R. Baird Named an "Attorney of the Year"

November 21, 2011
Best Lawyers Ranks Multiple Firm Practice Groups as Top Tier

October 28, 2011
Winthrop & Weinstine Expands IP Department, Adds New Patent Attorney to Form "Patent Boutique"

September 13, 2011
Seventeen Lawyers Listed in The Best Lawyers in America®

August 18, 2011
Winthrop & Weinstine Recognized as One of the "Best Places to Work" for 6th Time

July 12, 2011
Minnesota Super Lawyers® Includes Over Twenty Attorneys at Winthrop & Weinstine

July 12, 2011
Thirteen Winthrop & Weinstine Attorneys Selected for Inclusion in Rising Stars

May 23, 2011
Winthrop & Weinstine Helps Local Food Bank Raise Funds

March 21, 2011
Winthrop & Weinstine Announces 2011 Board of Directors

December 21, 2010
Winthrop & Weinstine Celebrates This Holiday Season with the Help of Local Talent

December 15, 2010
DuetsBlog Recognized as Top Minnesota Legal Blog

November 22, 2010
Sixteen Shareholders Named to Best Lawyers in America

No current information

January 17, 2018
IP Committee Panel Discussion and Networking Event

December 19, 2017
The Design and Substance of Trademark Clearance Opinions

December 11, 2017
Brewery and Distillery Law

November 17, 2017
Making Your Business Blogging Visible

September 15, 2017
Trademark Registration & Free Speech: An Insider’s View on Challenging Disparaging Trademarks

September 28, 2017
2017 Midwest IP Institute

June 27, 2017
Craft Beer, Distillery and Liquor Law: The Ultimate Guide

May 5, 2017
2017 Spring Meeting: The University of Iowa College of Pharmacy's Executive Leadership Board Meeting

April 27, 2017
SMART for Business: Protecting Your Business Property

May 24, 2017
Issues and Trends in the Ethical Use of Social Media and Technology

March 28, 2017
IP Series: When You Think All Hope is Lost – Creative Saves in Bad Situations

March 17, 2017
IP Series: Craft Beer Trademarks

March 15, 2017
IP Series: Trademark Damages

March 7, 2017
IP: Disparaging Trademarks - Redskins to The Slants

March 14, 2017
Trademark Bullying: Cease and Desist and Litigation Tactics in the Battle for Brand Protection

February 18, 2017
2017 CCC: Selecting, Protecting and Enforcing Winery Trademarks

January 31, 2017
Demonstrating Use in Commerce for Trademark Applications

October 27, 2016
Beta.MN/Plus: Sound Legal Advice for Startups

November 9, 2016
Navigating Trademark Oppositions and Cancellation Proceedings at the TTAB in Light of New Revised Rules of Practice

February 7-10, 2017
CiderCon 2017: Trademark Considerations

October 21, 2016
Iowa Law Alumni Panel for Intellectual Property Law Society

September 22, 2016
2016 Midwest IP Institute

April 29, 2016
2016 Spring Meeting: The University of Iowa College of Pharmacy's Executive Leadership Board Meeting

March 15, 2016
Intellectual Property Series: The IP Book – Top UDRP Decisions - March 15, 2016

May 18, 2016
American Intellectual Property Law Association 2016 Spring Meeting - May 18, 2016

March 15, 2016
Intellectual Property Series: Printing Infringement – Are 3-D Printers the Next Napster? - March 15, 2016

January 28, 2016
Decisions You Need to Know: Key Trademark Cases from 2015: January 28, 2016

February 16, 2016
Mastering U.S. Trademark Registration Practice - February 16, 2016

April 4-6, 2016
FUSE 2016: Designing Brands with Purpose

November 19, 2015
Digital Product Innovation Challenge

September 17, 2015
2015 Midwest IP Institute

August 18, 2015
Navigating Trademark Oppositions and Cancellation Proceedings at the TTAB

July 11, 2015
Race, Journalism and Sports: The Dilemma of the Washington NFL Team Name

May 8, 2015
The B and B Hardware Decision and its Effect on Trademark Practice - Webinar

June 10-12, 2015
Public Relations Society of America Midwest District Conference

March 26, 2015
30th Annual Intellectual Property Law Conference

March 31, 2015
Intellectual Property Series: Strategies for Owning Product Designs

May 15, 2015
2015 Indian Law Conference

March 10, 2015
IPO Education Foundation PTO Day 2015

January 13, 2015
Fraud in Trademark Applications and Registrations: Proving or Defeating Allegations

April 13, 2015
FUSE 2015: Brand Strategy & Design, One Collective Voice

January 30, 2015
Trademark Law for Paralegals

September 22, 2014
October 2: Start-up Formation, Agreements, and Negotiation Strategies Webinar

September 8, 2014
September 18-19: 2014 Midwest IP Institute

July 31, 2014
Navigating Trademark Oppositions and Cancellation Proceedings at the TTAB

April 25, 2014
Trademark Bullying Webcast: Where is the Line and When is it Crossed?

April 7, 2014
Fuse 2014: Design & Culture/Brand Strategy & Packaging

February 14, 2014
Fordham University Sports Law Symposium

February 5, 2014
Business Law Series: IP Issues Business Lawyers Should Watch for in 2014

December 13, 2013
IP Series: The Year in Trademark Law – Time Machines, Red Shoes and the Ale House Blues

December 12, 2013
IP Series: Changes to U.S. Patent Law Under the AIA – Business Method Patents

September 26-27, 2013
2013 Midwest IP Institute

September 11, 2013
Structuring Trademark Clearance Opinions

July 9, 2013
New Lawyer Experience: Finding and Keeping a Job in Tough Economic Times: Strategies for New Lawyers That Really Work

June 25, 2013
HOW Design Live’s Dieline Package Design Conference

May 22, 2013
Updated: Changes to U.S. Patent Law Under the AIA – Business Method Patents

April 11, 2013
Trademark Bullying: Latest Developments

April 26, 2013
Design Patent Flexes Muscles

March 22, 2013
Changes to U.S. Patent Law Under the AIA – Business Method Patents

February 15-16, 2013
Stephen R. Baird Speaks at "Fashion Law: the IP and Distribution Issues Facing the Industry Today"

March 6, 2013
Technology Law University Breakfast Seminar Series

January 30, 2013
Stephen R. Baird and Craig S. Krummen Give Seminar, "Intelligent Trademark Enforcement – Strategies to Avoid the Trademark Bullying Label"

October 24, 2012
Stephen R. Baird Serves as Panelist on "Trademark Clearing Options"

September 20-21, 2012
2012 Midwest IP Institute

March 13, 2012
Stephen R. Baird's "Brands, Blogs and the Big Bad Wolf"

February 8, 2012
Non-Traditional Trademarks: Sound, Color, Shape, Scent and More

January 19, 2012
ACC Networking Social

FEI Twin Cities Chapter Fall Event: Forward 2011

September 22 - 23, 2011
2011 Midwest IP Institute

April 04, 2011
SmartTalk Conversation with Ann Compton

March 10, 2011
The Stir - Formerly the Joint Dinner of Women's Professional Associations

December 02, 2010
Stephen R. Baird Discusses Social Media Hurdles at Minnesota PRSA Event

November 19, 2010
Stephen R. Baird Presenting at MN CLE on Marketing Your Law Practice Through Social Media

September 18, 2009
Webinar: What Trademark Lawyers Need to Understand About In Re Bose

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