3M's earplug-liability case began as a small patent fight with rival, report says
July 19, 2022 at 08:14 AM EDT
The mountain of legal cases facing 3M Co. over its military-grade earplugs — it's facing tens of thousands of lawsuits from veterans and potentially more than $1 billion in liability — may have its roots in a much smaller intellectual property fight with another earplug maker.
