Hausmarke (house brand, store brand, private label) is a term defined in Germany as a brand given by a wholesaler or retailer to a product manufactured by another company.
If the manufacturer markets it for his own under an own brand one would not call this a Hausmarke. Mirko is right on this.

Though the term is not best chosen. A less-ambigious and and also common term for the same thing is Vertriebsmarke (re-sale brand).