You wrote.."Is it possible that Austek paid such a paltry amount for a license because they had very few products that infringed the patents?"

Very distinct possibility..and our senior managment has indicated that infringement is a complicated / complex matter..

I don't see how we can use the % of sales calculation if we have no clue on how, what products, and to what extent the products infringe - especially where emdedded technology(ies) are concerned.