When Friz Freleng directed 1947's "Tweetie Pie," he may not have known he was making history. This, the first pairing of Sylvester the sputtering cat and Tweetie (later Tweety) the wide-eyed canary, won an Academy Award and united a duo that would appear in more than 40 Warner Brothers cartoon shorts by 1962. Sylvester and Tweety earned their studio another Academy Award for 1957's "Birds Anonymous" and several other Oscar nominations through the years. Generations of Americans have grown up watching Sylvester's classic, ever-thwarted attempts to catch Tweety. With two of the most famous voices in cartoons, both supplied by Mel Blanc, Sylvester's sloppy "sufferin succotash" and Tweety's baby-voiced "I tawt I taw a puddy tat," Sylvester and Tweety are two of the most quickly identified characters in cartoons