it is difficult to evaluate his contribution to your license.

$1000 seed money is very different from $1000 when you are rich. Think in this way: if you were living single life that time, would you still be able to achieve what you had now? just be objective.

you came to US as his dependent initially? if yes, how can you evaluate this?

calm down. 好說好散。 別搞得像仇人似的。