=== Competitor and Market Landscape ===
The below left graph display displays assignee wise IP activity over years, according to the present data the very first patent pertaining to HEV battery charging system was filed by HYBRICON in 1978 but not in the race anymore. Though NISSAN, AQUEOUS and TOYOTA seems to be ahead in acquiring max. number of patent to their credits, but not active since 2000. GM and HONDA have bagged a single-single patent of same age in 2003.
The below right graph display displays market (countries) eyed by various competitors. The hot market place for most competitors is Japan (17) followed by United States (11) and Germany (04). According to the present data Nissan seems to be having strong presence in Japan market than rest with 5 patents protected, followed by Aqueous and Toyota.
We will look in to their technologies in competitor approaches section coming latter in the report.
[[Image:Distribution.jpg|thumb|center|700px|Distribution of patents based on Technology focus]]
The above pie chart displaying various factors that has affect effect on battery charge and discharge and . The numbers indicating the distribution of patents in that area are from selected list of patents. The distribution of patents is based on technology focused in the patent.
'''Power generation''': Technologies disclosed in patents for modes of power generation in HEV for charging the battery and ways of handlingthem.
'''Power management''': Technologies disclosed in patents for managing the battery balance during power generating and/or consuming.
'''Fluctuating HEV operating mode''': Technologies disclosed in patents for managing battery balance during fluctuating operating modes, especially in composite HEV.
'''Power supply''': Technology disclosed in patent for starting engine with auxiliary battery current when main battery current is not sufficient to start engine
=== IPMap ===
[[Image:hev_ipmap.jpg]]
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== Clustering - Technology focus ==