In 1985, the Federal Circuit held that a permanent and continuous
presence in a particular district may be sufficient, rather than requiring a fixed physical location such as an office or store.
Of
particular note is the scale, coherence and tenor of the anomalism at Obelisk, the
presence of significant molybdenum, tungsten, silver and copper and the metal associations — which are similar to some of the very large deposits
in the
district.»