shadow mask
... that until Sony introduced a competitor in 1968, every color television in the world used RCA's shadow mask tube design?
... that until <a href="./Sony" id="mwA7c" rel="mw:WikiLink" title="Sony">Sony</a> introduced a competitor in 1968, every <a href="./Color_television" id="mwA7g" rel="mw:WikiLink" title="Color television">color television</a> in the world used <a href="./RCA" id="mwA7k" rel="mw:WikiLink" title="RCA">RCA</a>'s <b id="mwA7o"><a href="./Shadow_mask" id="mwA7s" rel="mw:WikiLink" title="Shadow mask">shadow mask</a></b> tube design?