I hope you don't mind but but I've a few general questions.
When you buy up old gane IP what level of documentation do you look for to feel comfortable that you will own it after the purchase?
I can imagine it'd be tricky if the IP belonged to a company that gone through a series of acquisitions.
If you had the purchase agreement for each company sale it'd be easy to show a chain of ownership but those things are often hard to come by.
If those documents aren't available what kind of secondary documentation / testimony would you use to satisfy your due dilligence?
Cheers
gaz