> Some things are best purchased from Mac or Snap On believe it or not. Sockets
> would be a good example. Snappy's "patented technology" is called
> "Flank-Drive" I think, and it works quite well. 

But for many years now, I've been buying sockets from HF with broached-out
corners that look just like Flank Drive.
I think you're right in that it was patented instead of copyrighted. I've got
Flank Drive sockets dating back to the late 1970s so I'm sure the patent is long



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