Schroeder & Siegfried, P.A. Minneapolis Intellectual Property Lawyer | Minnesota Trademark & Patents Attorney | Wayzata Copyright Lawyer Our intellectual property law firm, Schroseder & Siegfried, P.A., provide skilled intellectual property services and litigation respresentation. In practice for a combined total of nearly 75 years, our lawyers are highly knowledgeable about all areas of trademark, copyright, patent, and trade secrets.