Yesterday, I filed my 3rd Non-Provisional Patent Application, and today published the background theory for it at: https://www.researchgate.net/publication/323686205_Making_Guitars_with_Multiple_Tonal_Characters The patent involves matched, single-coil pickups for humbucking circuits with reversible magnetic poles.
I have a new area for publications of papers like this on ResearchGate.Net. There are 2 so far. You can find them at: https://www.researchgate.net/lab/Donald-L-Baker-Lab