A recent court filing from IBM appears to indicate a growing confidence on the part of the computing company that it will prevail in its legal dispute with SCO.
In an amended counterclaim to SCO's lawsuit, IBM has asked the court to rule that it has not infringed on SCO's copyright and has not breached its contractual obligations to SCO.
The filing further asks the court to rule that SCO, which was at one time a Linux supplier, cannot impose restrictions on the software that it previously distributed under Linux's open-source software licence.
In seeking a declaratory judgement, IBM appears to be indicating that has conducted an internal analysis of SCO's claims and has found them to be without merit, said Jeff Norman, an intellectual property partner with US law firm Kirkland Ellis.
"It just means that they didn't find any smoking gun. If they had found something really bad, they probably would have gone to SCO and talked settlement," Norman said.
It would be typical in a case like this for IBM to undergo an internal investigation to determine whether or not any of SCO's claims were true, Norman said.
Such an investigation would involve interviewing and reviewing e-mail and code contributions from IBM's Linux programmers, he added.
IBM has more than 7,500 employees involved in various aspects of its Linux efforts, including more than 600 developers who work in the company's Linux Technology Centre.
Jeffrey Neuberger, a partner with Brown Raysman Millstein Felder & Steiner, agreed that the filing appears to show growing confidence on the part of IBM.
Because IBM's filing seeks the broad judgement that IBM has not infringed on "any valid or enforceable copyright owned by SCO", a declaratory judgement in its favour would prevent SCO from bringing up new copyright claims later in the trial, and would have a devastating impact on SCO's case, he said.
"If the judge comes out and says there is no copyright infringement, then essentially there is nothing else to fight over. It would be the knockout blow to SCO's case," Neuberger added.
SCO sued IBM in March 2003 claiming that it had violated SCO's Unix licence, which was originally granted by AT&T but later transferred to SCO, and that it had illegally contributed source code to Linux.
In February, SCO amended its complaint to include charges that IBM had violated its Unix copyrights. SCO is seeking $5bn in damages in the case.
SCO claims that Linux users do not have the right to use the Linux operating system without a licence from SCO because Linux violates its Unix copyrights.
"SCO's threats and its claims against IBM and other Linux users are meritless, and are simply part and parcel of SCO's illicit scheme to get Linux users to pay SCO for unneeded licences to Linux," IBM said.
How much longer IBM and SCO will continue with the discovery stage of the case remains unclear. In a complicated case, the discovery process can last for years, Neuberger said.
Robert McMillan writes for IDG News Service