Hmm ... so it's okay for Smith and Wesson to make a Colt 1911 and a Smalther, and it's okay for Taurus to make a Model 10, and it's okay for Beretta to sell Peace Makers, but if Ruger does it--they SUCK! Right? Just wanted to be clear on that.
As to actual infringement, Glock sued Smith and Wesson over a tiny little piece of the Sigma, won their case and S&W paid them. If the Ruger is truly a Kel-Tec rip-off, and they have not already made some sort of financial arrangement with that company, I'm sure the courts will help the two sides work something out.
MY problem with the pocket Ruger is those damned sights!
If I'm close enough to use the gun without sites, I would rather use a knife (that way I KNOW It won't jam or run out of ammo). How flipping hard is it to put some damned sites on the gun just in case I have to use it, oh, I don't know, in PUBLIC!