freepatentsonline gives a score of 1000 for US patent which is the maximum score. In otherwords it's a sound and competent patent.
"US20150040844 ELECTRONIC CONTROL UNIT AND METHOD FOR REGULATING THE DISBURSEMENT OF HYDROGEN AND OXYGEN An apparatus that regulates a flow of hydrogen and oxygen generated by fuel cells as supplemental fuel for an internal combustion engine, in which a microprocessor controller receives engine... "
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