Decades-long Linux ownership dispute effectively dead after Xinuos appeal rejected — US Court of Appeals halts the legal wrangling over IBM’s and Red Hat’s use of Project Monterey UNIX code

A decades-long dispute over the ownership of Linux looks like it is over. Earlier this month, the United States Court of Appeals for the Second Circuit rejected Xinuos’ continued claims that IBM and Red Hat improperly contributed jointly‑developed Project Monterey UNIX code to Linux, reports The Register. Despite this deathly blow to its chances of extracting potential damages from IBM and Red Hat, and oodles of Linux royalties and licensing fees, Xinuos intends to seek a full‑bench rehearing. This appeal is a very long shot for Xinuos, with only 0.03% of such hearings granted, according to IBM’s legal representatives in the dispute.

This is a complicated case that spans decades. So, to make sense of what has happened over the years, we’ve constructed a timeline of key events, spanning from way back in 1998 to the present day.

• 1998 Project Monterey. IBM partnered with a firm called Santa Cruz Operation (SCO), Intel, and Sequent to build a unified UNIX running on multiple…