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Using PATENTSCOPE you can search 10,760,278 patent documents including 2,058,193 published international patent applications (PCT). Detailed coverage information can be found here (->)
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help icon"electric car"~50
help iconSmith or Klein
help iconWO2010000001
help icon"sol* panel"~5
help iconelect?icit?
help iconelectric^10 and car^3