SK was indeed bought up some years ago, but they continue to make tools and are fiercely vocal that every tool they sell is made in USA without exceptions.
http://www.skhandtool.com/
Actually, since SnapOn, Mac, and Matco have begun to decline with more and more non USA products of late, there has been quite an upsurge in SK tools in recent years.
The internet has reinvented the tool game. A savvy person can now research before they buy and a lot of mysteries as to who makes what tool have been exposed. For instance, look at Wilde, Trusty Cook, and Mayhew as examples. They makes a lot of tools for the big names. You can go straight to the source now and buy a nice hammer for instance that says Trusty Cook on it rather than SnapOn and save oodles of money.