Indium-tin oxide (ITO) is a clear conductive coating that is effective as a defog/defrost windshield method. This requires an optical coating which needs an expensive coating system. A company in Toledo makes large conductive glass pieces via a pyrolytic process that imbeds ITO in the glass. I’ve always thought clear conductive windshields would become the norm but expense might be limiting commercial use.
Due diligence: Previous commenter mentioned clear conductive coating approach.
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