As you like quoting people verbatim, please quote the text in Blumlein's patent that makes that assumption...

I want to see the context out of which you extracted it.

Anex is refusing to play ball.

You haven't provided a reference to what Gerzon said, so we can rule him out of the game too.

Hifi writers, well, it's hard to know where they get there ideas, and whether they are (mis)interpreting Blumlein, so you can leave them out of this.

In summary, you are on your own.