Guitar intonation fixers :Novax fanned frets

Don't know if you've discussed this before seeing that it's kind of old
news.

While Buz Feiten's system is the latest in bettering the guitar's
intonation,there is (at least I hope there still is) another older and
much more blatant and obvious system.
A luthier,Ralph Novak, invented a system with a fanned fret layout where
the spacing between frets is wider on the lower (6th) string side and
narrower on the higher (1st) string side.

Guitar Player reported that it did indeed work very well (though they did
not mention any real technical details ) .The jazz guitarist Charlie
Hunter plays (still ?) a seven string Novax guitar built by Novak.Novax
(the company name) also offered replacement necks.I've always wanted
one.....

Cheers,
Drew