<a href="https://en.wikipedia.org/wiki/Patent" id="mw5g" rel="mw:WikiLink" title="Patent">Patent</a> number US1781541 is awarded to <a href="https://en.wikipedia.org/wiki/Albert_Einstein" id="mw5w" rel="mw:WikiLink" title="Albert Einstein">Albert Einstein</a> and <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Leó_Szilárd" id="mw6A" rel="mw:WikiLink" title="Leó Szilárd">Leó Szilárd</a> for their invention, the <a href="https://en.wikipedia.org/wiki/Einstein_refrigerator" id="mw6Q" rel="mw:WikiLink" title="Einstein refrigerator">Einstein refrigerator</a>.