> If Apple were aware of the patent infringement back in 2004 and Tsera knew that; why did they not take action then? This is always my issue over these high p

> If Apple were aware of the patent infringement back in 2004 and Tsera knew that; why did they not take action then? This is always my issue over these high profile cases. Patents are crucial protection on an invention - but it would be nice to have a time limit in the law; requiring the patent holder to prove that they only found out about the infringement within the last X years/months.