Apple is suing Samsung for the touch screen technology rights, not on who 'invented' the tablet computer or smart phone. (we all know that had to be Al Gore!)
Samsung is counter suing on a number of the firm's data transmission patents.
At least that's the current set of lawsuits going on in Australia. There are many other suits in many other countries between these two companies.
Clicky
here for more details...
-Z-man.