DeWitt LLP

DeWitt LLP was founded in 1903 and is one of the 10 largest law firms in Wisconsin, with an additional presence in Minnesota. It has more than 120 attorneys practising in Green Bay, Madison and Metropolitan Milwaukee, Wisconsin, and in Minneapolis, Minnesota, and has the experience to service clients of all scopes and sizes. The firm is known for its work in a variety of legal areas including intellectual property, patents, trademarks and copyright law, construction litigation, corporate law, employment, environmental, employee benefits, estate planning, family business, family law, government relations, healthcare, litigation, real estate and tax law.

Recognised as leaders in the IP field by IAM Patent 1000, WTR 1000, IP Stars, Martindale-Hubbell and others, our attorneys work with clients around the world in all matters related to intellectual property. Whether it is an invention or trademark, licensing or trade secret, we help our clients safeguard their competitive edge and protect their intellectual property against theft and misuse. DeWitt’s IP attorneys regularly work with our clients to navigate the complex patent process, protect international rights, resolve disputes and address countless issues often associated with business processes, innovation, ownership, know-how and entrepreneurship. We stay at the forefront of what we do best so that you can concentrate on what you do best.

The firm’s client base is diverse. DeWitt represent clients of all scopes and sizes, ranging from non-profit organisations to universities, large corporations to international clients and individuals, just to name a few. In addition to clients based in the United States, our IP group has clients in the United Kingdom, Monaco, Australia, New Zealand, The Netherlands, India, Canada, China, Taiwan and Sweden. Distance and location are not an impediment to our working relationships with clients. We also have very close relationships with representatives in most foreign countries.

DeWitt is, quite literally, capable of representing your company in all its IP needs, worldwide. Whether you require assistance with patent, trademark, copyright, acquisition, litigation, in-licensing, out-licensing or deal brokering, we have a highly qualified and successful team of attorneys and patent agents ready and able to assist.

IP specialties


  • Preparation, filing and prosecution in the United States and internationally
  • Litigation
  • Licensing
  • Opinions and searches
    • Freedom to operate
    • Infringement
    • Patentability
    • Validity
    • Due diligence (acquisitions, divestitures, mergers)
    • Portfolio analysis

Trade secrets

  • Litigation
  • Licensing
  • Policy review


  • Registration
  • Litigation
  • Licensing
  • Due diligence
  • Portfolio analysis

Trademarks and unfair competition

  • Preparation, filing and prosecution in the United States and internationally
  • Litigation
  • Licensing
  • Opposition and cancellation proceedings
  • Opinions and searches
    • Availability
    • Infringement
    • Registrability
    • Validity

Examples of industries DeWitt covers

  • Aerospace
  • Agriculture
  • Artificial intelligence software
  • Alternative energy
  • Animal science
  • Arts
  • Biofuels
  • Clothing
  • Communications
  • Construction
  • Consumer products
  • Cookware
  • Dairy and cheese science
  • Data processing
  • Defence technologies
  • E-commerce
  • Entertainment
  • Fluid handling
  • Food and nutrition
  • Hydraulic fracturing
  • Hydraulics
  • Jewellery
  • Kitchen accessories
  • Labelling
  • Laboratory instrumentation
  • Machining
  • Manufacturing
  • Medical devices
  • Medical products
  • Optics/micro-optics
  • Packaging
  • Paper pulp
  • Petrochemicals
  • Pharmaceuticals
  • Photo imaging
  • Plant science
  • Restaurant services
  • Security documents and notes
  • Semiconductors
  • Small-batch distilleries
  • Sporting goods
  • Transportation
  • Veterinary products
  • Video and voice analytics

Examples of technologies DeWitt covers

  • Bio medical
  • Biotechnology
  • Chemical
  • Computer sciences
  • Electrical
  • Electromechanical
  • Green technology
  • Industrial
  • Information technology
  • Life sciences
  • Mechanical
  • Nanotechnology
  • Software

More information is available at

Contact details

DeWitt LLP
2 E Mifflin Street
Suite 600
Madison WI 53703
United States

Professional contacts

Other offices

  • Brookfield WI
  • Minneapolis MN

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