Well, I hadn't associated the name Kahn with EER that closely since the Sixties. :)  It was important to a lot of their "compatible SSB" work, but I don't think they deserve enough of the credit for the idea to stick their name on it.

 

However, if you have access to Motorola application notes, you might look for some articles by the late Helge Granville on the subject of EER.