The company has sent letters to a number of potential buyers for the patents, which date back to when the company was founded in 1996 and also include its original search technology.
The latest trial between Apple and VirnetX, which has been taking place over the last week, is a do-over of an earlier 2012 patent clash between the two parties.
Creating innovative software and getting a patent for it do not line up very well in this day and age. Here are eight reasons why the two are such different worlds.