http://www.google.com/patents/US20040200601
Stock Intel coolers do look like this today and have for a while.
I used to spend a lot of time thinking about heatsinks. It is all tower and heatpipe models today, though, e.g.
http://www.anandtech.com/show/6830/cpu-air-cooler-roundup-si...
Originally popularized by the Scythe Ninja back in gosh, what, 2004 or so? It was a super effective design, main refinements over time have been more and more "slices" and direct contact heatpipes. Nobody afaik has beaten efficiency of the tower heatpipe design to date.