equivalent transforms
... that AT&T once released designs for 83,539 equivalent transforms of a circuit into the public domain just to deny their competitors the ability to patent them?
... that <a href="./AT&amp;T" id="mwC7Q" rel="mw:WikiLink" title="AT&amp;T">AT&amp;T</a> once released designs for 83,539 <b id="mwC7U"><a href="./Equivalent_impedance_transforms" id="mwC7Y" rel="mw:WikiLink" title="Equivalent impedance transforms">equivalent transforms</a></b> of a <a href="./Electrical_network" id="mwC7c" rel="mw:WikiLink" title="Electrical network">circuit</a> into the <a href="./Public_domain" id="mwC7g" rel="mw:WikiLink" title="Public domain">public domain</a> just to deny their competitors the ability to <a href="./Patent" id="mwC7k" rel="mw:WikiLink" title="Patent">patent</a> them?