"However, while its patent filings have been, the company hasn't managed to stay out of the courtroom. The number of patent lawsuits against the company has increased substantially in the past couple of years. "That increase has come almost entirely from entities that do not produce products," Eppenauer said. Most of the suits have come not from other technology companies, he said, but rather from the firms whose primary business is acquiring and enforcing patents. In those cases, having a large patent arsenal of one's own is of little use, since there are no products that could be used to countersue over."