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.

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Erin E. Block

Greater Milwaukee
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Anastasia Tsiantou

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Erin is an associate in DeWitt’s Intellectual Property Practice Group. She assists clients with all facets of intellectual property law, particularly patent prosecution, litigation, opinion letters, trademarks and copyrights. In this capacity, Erin helps to prepare domestic and international patent applications and handles the prosecution of those applications through to issuance.

Erin specializes in the software and computer engineering fields and has successfully assisted clients in receiving patents in these areas, particularly for computer software, artificial intelligence (AI) and machine learning. She also focuses on assisting startups and individual entrepreneurs in understanding their intellectual property rights, how best to protect those rights, and the potential pitfalls startups and entrepreneurs face in regards to intellectual property protection.

Articles & Presentations​

  • "The End of the “Wild West” for Software Patents – Does the Patents Act 2013 Change New Zealand’s Treatment of Software Patents from Permissive to Restrictive?" 19 MARQ. INTELL. PROP. L. REV. 141 (2015)

  • “Growing the Distance,” Inventor’s Eye Newsletter affiliated with, (August 2014)

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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


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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.

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