They do have the patents,
http://www.chillingeffects.org/ecom/
go to Acacia, and click the numbers to read the actual details of the patents from the patent office (also check out some of those other fucked up patents).
Acacia didn't actually get the patents themselves, in 2001 they bought a company that originally had the patents, and the "ownership" transfered over to Acacia.
Fucking Acacia.