When the Silencers first came out there were posts over at Duncan forum about the Vox CoAxe pickups from back 15-20 years ago. It was a novel design but not the first multi-voice type pickup. Duncan had P-Rails, Barden had Two-Tone and so on. I'm not sure the Co-Axe guitars were even released in the US though. I'm not sure how many coils either but they had the same appearance of two rails on either side of a larger screw pole bobbin.
I did install a set of Silencers but I didn't fully disassemble them. Three coils being hum canceling didn't compute at first. Best I can tell its like they took the concept of the dummy coil from a stack, split it in half, put one half on either side of the main coil to fir the soapbar shape, then wired the halves in series. So if a humbucker is two coils opposite magnetic polarity and current flow, then the silencer is two matching half coils summed together plus one whole coil of opposite magnetic polarity and current flow to get hum canceling. I'd say its a novel idea.
At one time I was a serious P-90 devotee and I tried several older gen Kinman P90-HX flavors. If the Silencers are 90% true P-90 tone without hum, I'd give those Kinmans at least a 95. A little too much high mid-range presence though for me. Problem was they were taller then stock P-90's and who wants to rout their guitar deeper after already shelling out $300 plus for pickups. They have a newer gen that's supposed to be standard height but prices are even more exorbitant now I haven't splurged.