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3M's earplug-liability case began as a small patent fight with rival, report says

By: Minneapolis / St. Paul Business Journal via Business Journals

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.

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3M's earplug-liability case began as a small patent fight with rival, report says