In the Outlaw newsletter they stated that:
The Outlaw LCR Speaker will be the world’s first dual-purpose speaker capable of either vertical operation for use as a left/right speaker, or in the horizontal position normally used for center channel placement.
I would like to inform Outlaw that NHT made 2 separate lines of speakers (each with multiple releases)that which were sold as either a Left/Right surround speaker if mounted vertically or a center channel if mounted horizontally. The NHT VS1.x and 2.x speakers had the exact same speaker configuration as Outlaw's LCR speaker and the VS2.4's had the same size speakers. Both speaker lines have been out of production for some time. I purchased my VS1.4 around 2003 near the end of its production life. While I could not find when these speaker lines were introduced, it would not surprise me if NHT got "there" a decade before Outlaw.
You could even make a case that Outlaw's current speaker line is a much higher end update to what NHT tried to do with its Superzero and VS lines.