FRAND refers to terms that are "fair, reasonable and non-discriminatory" and is the IT industry standard for technology use.
"The negotiations have been unsuccessful because Apple refuses to pay a FRAND royalty to the Plaintiff's license."
Apple argued unsuccessfully that the patents were invalid, according to legal publications.
"Lawsuits like this by companies who accumulate patents simply to harass the industry only serve to stifle innovation and harm consumers," Apple said in a statement reported by media outlets.
The case is one of many patent suits from licensing firms that make no products but hold rights to certain technologies. Critics call these firms "patent trolls."
The Texas court has twice ruled against Apple in the past, demanding it pay hundreds of millions of dollars to VirnetX - another company specializing in patent litigation.
On its website, PanOptis offers to manage its clients' patents, allowing them to concentrate on "innovation and new development.