It has been discussed on GTP before, try a search for "immersion".
I think a patent lasts 14 years. So if the immersion patent was before summer 2001 we are good.
Here is a list of immersion patents:
http://www.immersion.com/haptics-technology/patents/
Also check out
https://en.wikipedia.org/wiki/Immersion_v._Sony
for a bit of history between Immersion and Sony.
Immersion has sued a number of companies for breach of patent. Developers need to be careful what they do until it is safe to allow support.
In terms of fanatec and thrustmaster support I understand they have contributed an appropriate fee to cover the license costs in order to be supported on the PS4. They are selling console market wheels.
It would all depend on whether Immersion has a utility patent, or a design patent, or both. Design patents are for 14 years, utility patents are for 20 years.
Also, why do you assume that Immersion's licensing of FFB tech to Logitech forbids them to make drivers for PS4? I think you & some others are reading way to much into this.
The court case between Immersion & Sony is something I'm well aware of. It was to do with Sony's Dual Shock system, & had nothing to do with FFB wheels.
Logitech have already said they're working on PS4 compatibility, & Sony have said that any wheel manufacturers can make drivers for PS4 games. I presume that it's up to Sony & Logitech to work out a deal, which is probably what they've been doing all along behind the scenes.
I see no evidence whatsoever that Immersion have anything to do with Logitech wheels not currently working on PS4.
Logitech are not selling console market wheels so do not wish to pay any fees to get support on the PS4.
That's plain & simply wrong, they're still selling the DFGT on their website
here, & Logitech have made no statements that they do not wish to pay money to get support on PS4.
What they actually said is that they are pulling out of the console peripheral market, however, they are still selling current products like the DFGT. The G25 & G27 are not console peripherals, but are PC peripherals, & it's in Logitech's best interests to sell as many G27's as possible. So I see no reason why they wouldn't want to supply a PS4 driver to game developers like SMS. It's more likely that it's NDA's & exclusive licensing deals that are holding them back for now.
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