3M Slaps Safe Life With Patent Suit Over Respirators
3M filed its complaint Feb. 17 in the U.S. District Court for the District of Minnesota, accusing California-based Safe Life and subsidiary Triosyn Corp. of infringing U.S. Patent Numbers 6,119,691 and 6,953,544 by selling certain respirator products.
The '191 patent, issued in 2000, is titled “Electret filter media” and describes a mask made of thermoplastic fibers. The '544 patent, issued in 2005, is titled “Method of making...
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