I don't think that Vilchur actually claimed to have invented something absolutely new -- Olson had described something rather like an acoustic suspension speaker years before, but I think it was Vilchur who connected the small box, which raised the very low resonance of the driver, the damping to absorb the backwave, and the very powerful magnet (to compensate for the heavy cone) and the long voice coil and long excursion. It was Vilchur I believe who realised that amplifier power was cheap, and speaker volume expensive.
But its also worth noting that Vilchur contribution was not just technical -- it was in marketing also -- he is incontestably the person who created the market for the acoustic suspension speaker, and he did it by creating a company with progressive labor relations, which was research oriented, and advertised more effectively than practically any audio company ever has. Their ads were graphically attractive, appealled to the intelligence of the consumer, and were convincing, both technically and domestically. And don't forget the booth in Grand Central. There is a reason they once had something like a third of the entire speaker market.