Lee Mendelson Film Productions has filed a copyright infringement lawsuit against the U.S. Department of the Interior and three companies for allegedly using music from the beloved "Peanuts" catalog without permission.

The production company, which owns the rights to the iconic jazz-influenced music associated with the Charlie Brown television specials and films, alleges that the Interior Department illegally incorporated the recognizable tunes into social media posts and a video game.

The lawsuit also targets three private companies alongside the federal agency, though specific details about their alleged infringement were not immediately available. The complaint represents the latest effort by the rights holder to protect the valuable "Peanuts" music catalog from unauthorized commercial use.

The "Peanuts" music, originally composed by Vince Guaraldi, has become synonymous with the animated specials featuring Charlie Brown, Snoopy, and other characters created by cartoonist Charles M. Schulz. The jazz compositions, particularly pieces like "Linus and Lucy" and "Christmas Time Is Here," have maintained cultural significance and commercial value for decades.

Copyright infringement cases involving government agencies are relatively uncommon, as federal entities typically have legal departments that review content usage. The outcome of this case could establish precedent for how government agencies handle copyrighted material in their digital communications and interactive content.