In wikipedia http://en.wikipedia.org/wiki/AngularJS is says "AngularJS was originally developed in 2009 by Miško Hevery and Adam Abrons [10] at Brat Tech LLC[11] as the software behind an online JSON storage service, that would have been priced by the megabyte, for easy-to-make applications for the enterprise. This venture was located at the web domain "GetAngular.com",[11] and had a few subscribers, before the two decided to abandon the business idea and release Angular as an open-source library"

I think here they mention it in the adventures in Angular podcast that Misko took it from a previous company which was a startup between him and another developer that did not went through -> http://devchat.tv/adventures-in-angular/001-aia-the-birth-of...

It might also have been here or one of the the Javascript Jabber Angular episodes (their search functionality seems to be down for the moment)

but it was just the bare bones idea, that got expanded a lot in Google.