Mines Management, Inc., together with its subsidiaries, acquires, explores, and develops mineral properties in North America. The company primarily explores for silver, and base and precious metals. Its principal mineral property interest includes the Montanore silver-copper project comprising 10 patented and 861 unpatented mining claims located in Sanders and Lincoln Counties in northwestern Montana. Mines Management, Inc. was founded in 1947 and is based in Spokane, Washington.