And it seems its an Aussie who invented it: https://www.pressreader.com/australia/wangaratta-chronicle/20170206/281595240267883 W
Week 46 Wrap: Copper hits 2mth low as Trump threatens net zero pace; US rally fades; HotCopper’s picks
AN1 CuFe sells its Crossroads gold royalty to Northern Star for $4M cash; says better than waiting for mine launch