Eugène Hénard
... that Eugène Hénard envisaged roof-top helicopter landing pads in 1910, before helicopters had been invented?
... that <b id="mwwg"><a href="./Eugène_Hénard" id="mwww" rel="mw:WikiLink" title="Eugène Hénard">Eugène Hénard</a></b> envisaged roof-top <a href="./Helipad" id="mwxA" rel="mw:WikiLink" title="Helipad">helicopter landing pads</a> in 1910, before <a class="mw-redirect" href="./Helicopters" id="mwxQ" rel="mw:WikiLink" title="Helicopters">helicopters</a> had been invented?