Hmmm...

Bubble hash and cold water extract has been around forever...

In the past I remember that most those imported pressed hashish bars were water extract or were produced by methods elucidated in the video link below.

[MEDIA=youtube]ipYPLTArkcU[/MEDIA]

At 18:34 in this video link we see traditional hash making techniques preformed by Moroccan growers.

I suppose IPA extract is called "iso-hash" as well, however isomerizer-hash is also known as "iso-hash", isomerizer machines are an older phenomena, so iso-hash meaning "isomerizer hash" rather than IPA extract is probably a dated term.

-eg