Software developer InterTrust Technologies has expanded its lawsuit against Microsoft – adding four fresh allegations.

The company first filed its patent-infringement suit against Microsoft last year. Now its added four allegations of patent infringement to the suit it filed then. InterTrust is prosecuting Microsoft over a total of 11 patents, 144 claims and over 190 infringement scenarios it believes Microsoft violated.

InterTrust alleges that Microsoft products, including Windows XP, Office XP, Microsoft .Net, several Microsoft .Net-based products and services, and Windows Media Player infringe on its patents. The company is seeking unspecified compensatory and punitive damages for the alleged violations.

Failed talks Talal Shamoon, vice president of business development for InterTrust, said the 12-year-old company has attempted to negotiate licensing deals with Microsoft regarding InterTrust's patents, but the talks haven't led to contracts.

The company is now seeking to get Microsoft to license its technologies for fair value, he said. “We're happy to let the courts decide, and we're willing to see it through,” Shamoon said. “The more we dig, the more we find infringing instances. We just want to be able to be paid for our inventions.”

Microsoft spokesman Jim Desler said his company had not yet reviewed the latest filing by InterTrust. “It seems to be a familiar pattern from a company whose sole business purpose appears to be filing patent claims against Microsoft,” Desler said.

InterTrust originally alleged that Microsoft infringed on a patent that covered system components for receiving encrypted content and rules, securely managing content use and transmitting rights, managed content, and related rules to other users.