Patent litigation filings declined significantly in 2014, falling 29 percent from the previous year. But nonpracticing entities (NPEs) continued to be responsible for a huge percentage of that litigation, according to a group that helps small- and medium-sized businesses fight frivolous patent suits.

Unified Patents, which strategically protects broad areas of technology to deter lawsuits by patent trolls, reported Thursday that 5,002 patent lawsuits were filed last year, considerably less than the 6,030 filed in 2013 and also slightly less than the 5,378 filed in 2012. In November, the organization said it expected the number of patent lawsuits filed in 2014 would surpass 2012's filings.

Despite the lower overall numbers, Unified Patents noted that a record 83 percent of all high-tech sector lawsuits were filed by NPEs. “NPEs account for a huge percent of lawsuits, and this is especially clear in the high-tech sector,” said Unified Patents COO Shawn Ambwani.