I'll have a try..
Multiple interests worked on a stereo TV scheme for about 10 years before the Zenith system was finally approved by the FCC in 1984. At least they settled on one. They let AM stereo's 4 systems battle it out, and nobody won. Same thing with quadraphonic in the '70s.. died off from 4 competing systems confusing things, and everyone gave up for the time being, until surround sound resurrected it.
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