Normal
As patents are VERY specific, I'm pretty sure it's just the way its implemented that's patented, not the concept of reverse blowing itself.For example, with the GTX 580 that blows that stuff off, the controller for that is probably sitting on the card itself, while the enermax fans could be the first ones to incorporate a small circuit that takes care of this thing. And that might be what they pantented: "Method for Integration of Electronic Circuit into the Frame of a Fan for use in Personal Computers implementing automated Spin Direction Reversal during Startup for Cleaning of the Fan Chassis and Dust Filters"So mainboard manufacturers would actually be able to design their boards to implement this sort of thing to work with any fan in existence. That makes it even more curious why it's not yet widely used.
As patents are VERY specific, I'm pretty sure it's just the way its implemented that's patented, not the concept of reverse blowing itself.
For example, with the GTX 580 that blows that stuff off, the controller for that is probably sitting on the card itself, while the enermax fans could be the first ones to incorporate a small circuit that takes care of this thing. And that might be what they pantented: "Method for Integration of Electronic Circuit into the Frame of a Fan for use in Personal Computers implementing automated Spin Direction Reversal during Startup for Cleaning of the Fan Chassis and Dust Filters"
So mainboard manufacturers would actually be able to design their boards to implement this sort of thing to work with any fan in existence. That makes it even more curious why it's not yet widely used.
