Miele is currently one of the brands manufactured by ProCycles in Saint-Georges (Québec, Canada). However, I believe that at some point it was a brand of its own and that the bikes were manufactured along the 401 in Ontario (Canada). Probably one of those cases where the original owner was old and he sold the company...

As far as I know, there never was any relation between the bicycle company and the German appliance manufacturer. Whether the original plant owner was Mr. Miele or someone who bought the rights to use the name, I have no idea.