S4 Medical Patents

Patent portfolio assigned to S4 Medical (verified via public assignee records). Ohio medical-device company (Esolution esophageal deviation/protection device for AFib ablation; tech from Ohio State). Press confirms a 'patented' device and 'an issued patent' (has_patents=true); exact count not confirmed on a fetched page so estimate left 0. No named customers (sold to hospitals/EPs but none named); no direct competitors confirmed from a fetched page.