Thunderfoot
Hero
Why did I know YOU would be the one to disagree? 
Like I said, "invented", I liken it to how Ringo Starr "invented" the use of the hi-hat in drum playing. Sure it was around before him, but is was there as an effect, not a real part of playing - each one used their respective take and now they are both part of essential playing.
But technically, DAs right, it was around before EVH, but again not in the way they are today.
Funny you should mention Jimi, because he NEVER used them together, he would pick-pull and pick-hammer (or even pick-hammer-hammer). One of the reasons he was so good was because he could pull that stuff off before the pick-pull-hammer combination was around.
But anyway enough de-railing... Did we answer your question?

Like I said, "invented", I liken it to how Ringo Starr "invented" the use of the hi-hat in drum playing. Sure it was around before him, but is was there as an effect, not a real part of playing - each one used their respective take and now they are both part of essential playing.

Funny you should mention Jimi, because he NEVER used them together, he would pick-pull and pick-hammer (or even pick-hammer-hammer). One of the reasons he was so good was because he could pull that stuff off before the pick-pull-hammer combination was around.
But anyway enough de-railing... Did we answer your question?