There doesn't seem to be much news out there about it, but as of the fourth quarter of 2008, Yonex began engraving the weight/grip/tension specs on the cones of their rackets instead of using the traditional stickers.

I first noticed this when I purchased a nanospeed 9900 that was made in May of 2009. I have to admit, it's pretty badass.

Based on this change, we can tell that Yonex is trying to step it up on authenticity identification and fake racket prevention. It's been nearly a year since the original change, the question is, how soon do you guys think it will be before fakers catch on and start replicating the engraved specs?