[heffo]

Unlikely, most patent licenses include a clause that handles invalidation of the patent, without revoking the license.

[dboreham]

But it is possible to negotiate a license with a clawback clause in the event of invalidation.

[michaelmrose]

When sued by an entity with no assets to speak of that uses its funds to fund suing other parties you are probably not getting your money back no matter what it says.