The details are thin, but Imagination says Samsung will be using its technology in up-coming SoCs for the mobile and consumer markets. Which is Apple-town. The intellectual property in question is for Imagination's PowerVR SGX MP multiprocessor graphics family, it says.
Readers might recall Apple signing on with PowerVR back in 2008.
Apple and Samsung were once quite friendly - with Samsung manufacturing much of Apple's kit - until a patent row kicked off in the courts because Jobs' Mob believed the Korean company was pinching all of its best ideas.
The Hertfordshire -based Imagination hasn't disclosed terms of the agreement.