 MNNEAPOLIS--BUSINESS WIRE--Tennant Company NYSE: TNC, a world leader in the design, manufacture and marketing of solutions to reinvent how the world cleans, today announced the launch of a suite of commercial floor scrubbers to the North American market that reduce the cost to clean with simple operation and dependable scrubbing performance. The T290 and T390 Walk-Behind Scrubbers and the T581 Micro-Rider Scrubber provide core functionality at a competitive price and expand Tennants curren 