Men's Restroom Black - White Sign Includes Wheelchair Accessible Depiction. Rock Ridge is a trademark of Rock Ridge Sales, Inc. With respect to sales on Amazon.com, we will provide a manufacturer's warranty only for products purchased from a reseller who we have confirmed as providing genuine, new and authentic Rock RidgeTM brand products. Currently, Rock Ridge Sales is the only reseller that we have so confirmed and authorized, and the only resellers for which the manufacturer's warranty applies.