Wisconsin court records are put online by the circuit courts for most (not all) criminal, civil and other cases. It's on the Consolidated Court Automation Programs web site (CCAP).
Wisconsin's registered Sex Offenders may be found at the Wisconsin Sex Offender Registry. There's also a National Sex Offender Public Registry.
Corporations in Wisconsin, LLCs and other business records are often able to be found at the Wisconsin Department of Financial Institution's Wisconsin Corporation Records.
Wisconsin Personal Injury Lawyer