Content-Type: text/shitpost

It seems clear that the heavy metal umlaut was first discovered by Blue Öyster Cult, although some claim, implausibly, that its invention by Mötorhead was an independent one. Blue Öyster Cult's album of that same title was released in 1972; Mötorhead was not convened until 1975.

But as far as I know nobody has suggested that both groups were anticipated by, and perhaps even inspired by, Häagen-Dazs, which dates to 1961.