3M files patent lawsuit against Andover Healthcare

US conglomerate 3M and 3M Innovative Properties have filed a lawsuit in the US District Court for the district of Minnesota against Andover Healthcare, seeking a preliminary injunction as well as a permanent injunction and damages regarding Andover’s two-layer compression bandage systems.

The suit alleges that Andover’s two-layer compression bandage systems, including the CoFlex TLC Two Layer Compression System and the CoFlex TLC Lite Two Layer Compression System, infringe a 3M patent (US Patent No.7,854,716) covering its innovative 3M Coban 2 Layer Compression System and 3M Coban 2 Layer Lite Compression System.

These systems deliver sustained compression therapy, which is considered a standard of care for treating venous hypertension and venous ulcers – a serious problem for many Americans, including the elderly and people with vascular disease or poor circulation.

3M introduced Coban brand 2 Layer Compression System in 2006 and introduced Coban brand 2 Layer Lite Compression System earlier this year.