Using the quick search there are shown up to three reports about Plug-in Hybrid:
Dr. Charles Perry’s newest patent, which is pending, potentially could save America 120 million gallons of fuel daily.The invention has several names – wheel hub motor, Plug-in Hybrid Retrofit Kit or ...
Energie und Elektrotechnik |Using the fulltext-search for the word Plug-in Hybrid you can set up serveral searching-options > choose search options