Mackall, Crounse & Moore, PLC has joined Dewitt Ross & Stevens S.C.

The newly formed DeWitt Mackall Crounse & Moore S.C. will provide clients with enhanced legal services
and efficiencies as well as access to more than 100 attorneys practicing in nearly 30 areas of
law in Wisconsin and Minnesota.

Dismiss this message


View Full Biography:

Download VCard

David L. Biek

Email Me
Debby Schumacher

Email Full Biography

Message Details:
  • To:

  • From:

  • PDF of the biography will be included.
  • Cancel

David has about 30 years of experience helping clients to protect and enforce their valuable intellectual property assets while also gaining a competitive advantage in the marketplace. He works diligently to ensure the legal results delivered to his clients align with their business and intellectual property goals.

His experience includes being the first in-house patent counsel of Cargill, Inc. a global food, agriculture, industrial and financial products company based in Minneapolis. In that role he built a group of attorneys and paralegals within the company which was able to adeptly handle its IP issues. He later became Cargill’s Deputy Chief Intellectual Property Counsel.

He has personally negotiated numerous divestitures, acquisitions, joint ventures, licensing and collaborate research transactions with third parties on an international basis. Additionally, he has litigated or managed numerous large-stakes patent and trade secrets infringement cases and provided legal opinions to clients on a wide array of infringement and patent validity issues.

His experience as in-house and outside IP counsel has provided him with a unique perspective that allows him to offer keen insight to a variety of clients ranging from corporate entities to individuals.

​Notable Representations

  • Manage legal issues related to trade secrets, patents, trademarks, and copyrights.

  • Prepare and prosecute patents to protect inventions in a variety of technological fields, including the mechanical, chemical, biotechnology, and business methods arenas.

  • Prepare and prosecute trademark registrations for clients in many different industries.

  • Investigate and deliver patentability, freedom-to-operate and non-infringement legal opinions related to third-party patents. Work with clients to safely work around competitors’ patents.

  • Business Transactions – prepare and negotiate confidentiality, research, joint development, license, M&A, joint venture, manufacturing, and distribution agreements to monetize intellectual property or obtain rights under third-parties’ intellectual property.

  • Conduct due diligence inquiries and analysis and IP audits.

  • Litigate patent and other intellectual property disputes.

  • Develop strategic patent and trademark portfolios, IP strategies and IP plans.

Our Locations

Greater Milwaukee - Get Directions

Green Bay - Get Directions

Madison - Get Directions

Minneapolis -Get Directions


Get to know us

DeWitt LLP is one of the ten largest law firms based in Wisconsin, with an additional presence in Minnesota. It has more than 130 attorneys practicing in Madison, Greater Milwaukee, Green Bay and Minneapolis in over 30 legal practice areas, and has the experience to service clients of all scopes and sizes.


We are an active and proud member of Lexwork International, an association of mid-sized independent law firms in major cities located throughout the Americas, Europe and Asia and an active member of SCG Legal, an association of more than 140 independent law firms serving businesses in all 50 state capitals and major commercial centers around the world.


Best Lawyers 2013 – 2021
Super Lawyers 2021
Compass Award 2012
Top 100 Lawyers: National Trial Lawyers Association


While we would like to hear from you, we cannot represent you until we know that doing so will not create a conflict of interest. Accordingly, please do not send us any information about any matter that may involve you until you receive a written statement from us that we represent you (an “engagement letter”). You will not be a client of the firm until you receive such an engagement letter.

The best way for you to initiate a possible representation is to call DeWitt LLP at 608-255-8891. We will make every effort to put you in touch with a lawyer suited to handle your matter. When you receive an engagement letter from one of our lawyers, you will be our client and we may exchange information freely.

Please click the “OK” button if you understand and accept the foregoing statement and wish to proceed.