=== IP activity over the years ===
[[Image:patentsoveryears.jpg|thumb|center|500px|IP activity over the years]]
=== Assignee wise IP activity ===
Companies with most HEV battery patents are arranged in decreasing order in below graph. Top three players are Nissan motors with (5) patent records to its credit, followed by Toyota with (4) and Acqueous (3).
[[Image:Assignee wise IP.jpg|thumb|center|500px|Assignee wise IP activity]]
=== IPMap ===
[[Image:hev_ipmap.jpg]]