transformer
... that the two basic transformer constructions in common use today are based on designs described in patent applications from 1885?
... that the two basic <b id="mwCdg"><a href="./Transformer" id="mwCdk" rel="mw:WikiLink" title="Transformer">transformer</a></b> <i id="mwCdo">(pictured)</i> constructions in common use today are based on designs described in patent applications from 1885?