Peter Masak
...that sailplane winglets were first successfully implemented by American inventor Peter Masak?
...that <a class="mw-disambig" href="./Glider" id="mwB1k" rel="mw:WikiLink" title="Glider">sailplane</a> <a href="./Wingtip_device" id="mwB1o" rel="mw:WikiLink" title="Wingtip device">winglets</a> were first successfully implemented by <a href="./United_States" id="mwB1s" rel="mw:WikiLink" title="United States">American</a> inventor <b id="mwB1w"><a href="./Peter_Masak" id="mwB10" rel="mw:WikiLink" title="Peter Masak">Peter Masak</a></b>?