Access, the Japanese company that purchased PalmSource last year, has sold a perpetual licence for the Palm operating system (OS) to PDA-maker Palm for $44 million (£22.3m).

The non-exclusive source code licence allows Palm to modify the code base of Palm OS Garnet for use in any of its devices, including the Palm Treo family of smart phones, as well as other handhelds, Access said. The agreement also gives Palm the right to use the Palm OS Garnet in whole or in part in any Palm product, including alongside other system technologies.

The agreement comes just over a year after Access bought PalmSource for about $324.3 million. PalmSource was originally the software division of Palm, and was spun off in October 2003.

The news comes as Palm awaits any movement in the mobile OS company, NTP filed against it alleging OS infringement lodged in a US court early November.