Those patents tell an interesting tale, and one not terribly flattering to the University of California. It looks like back in 2006 they invented and patented a

Those patents tell an interesting tale, and one not terribly flattering to the University of California. It looks like back in 2006 they invented and patented a variant of the old-fashioned clear domed LED which uses total internal reflection to redirect the light emitted from the rear of the LED out the front, rather than the reflective metal anvil they usually use. This is obviously not a filament LED. The only thing it has in common is that some filament LEDs put the dies on a transparent substrate, though for the purpose of emitting light out the backside of the filament rather than the front. However, they managed to get a set of claims in the '789 patent so broad that it covered all constructions that emit light out the backside of the LED. (The other three patents were filed after filament LEDs became widespread, claiming priority to earlier patents.)