This is the real deal not a fake patch that are currently hanging out there on eBay. The originals had Sylvester underneath the cat not above. Please see the pictures for details, this is in used condition, I say that because I don't think it was ever sewn on, but you can see the edges have some wear.

This vintage Sylvester the Cat patch is a rare find featuring the iconic Warner Brothers logo below. The multicolor embroidered patch not only pays tribute to the Looney Tunes TV show but also to the Tweety Bird franchise. Made in the United States with cloth and fabric materials, this unique piece is a must-have for collectors and fans of cartoon and TV characters. The interactive features of this unit make it a special addition to any animation merchandise collection.