Thanks!
If you do a big deal like license artwork for a product line or something, and negotiate back and forth then you might know more details. Rights managed type work.
But for RF type sales you most likely will never see it. It might not even get out of the planning stage. The work might be used as a possibility, end up in a presentation or mock up or even just sit on the designer's hard drive for possible future use.
Then again you might be surfing around and run into it.