Not surprising, patents are tricky and no one from Swarovski legal has come on to explain in layman's terms what exactly does their USA patent cover.
The same argument was made in Europe but when Leica challenged it they won so there is precedent that when push comes to shove the US Patent would also not hold up; however, as ILya mentioned above, the court costs for both sides is quite extensive. While Leica won the court battle in Europe they did not go after the US Patent and pulled their Magnus line from the US Market. No one expect Leica knows for certain the reason they pulled the Magnus line out of the US but we conjecture that it was the patent issue, if the Magnus line returns to the US after the Swaro patent expires I think we have our answer.
A lot of people are upset with the patent, but that doesn't mean it is absurd. Whether Swarovski was justified or not in submitting the patent, they had the wherewithal to do so before the long range sport optic market exploded in the US and thus hindered other manufacturers from building out wide FOV designs, what is surprising is that Swaro has not taken advantage of this patent with FFP scopes until just last year with Kahles. Imagine if Kahles had the ultra wide FOV design back with the K624i, I think they would have garnered considerably more than the market share they had. Granted, Kahles kind of went backwards when introducing their 5x erector line (K525i and K318i) by decreasing the FOV compared to K624i; seems like Kahles quickly realized this and offered their wider angle FOV eyepiece with the K525i DLR; however, not offering the wide angle FOV eyepiece with their K318i was baffling, had they done so I think it would have rejuvenated interest in that scope, instead they release the K328i which nobody was asking for, let me rephrase that... which nobody asked for at 37oz which is out of the comfort range for many looking for a nice crossover design.
Again, conjecture, I don't think anyone has known for certain that this was actually the case, but the fact that the TT 7-35 has narrower FOV than the TT 5-25 seems to lean in that direction.
Your guess is as good as anyone else at this point
March is a smaller boutique sport optics manufacturer so doubtful they have the clout to go up against Swarovski. As ILya mentioned above it is likely that Swaro just is not interested, maybe thinking it's not worth it. But again, everyone outside of Europe has seemingly gotten a pass while optics manufactures in Europe have not been willing to take the risk in the US market (ZCO, Zeiss, S&B et al).
There is some discrepancy as to when the patent was actually submitted, was it 2006 or 2008 or? The patent will apparently expire 20 years after submission so if it was 2006 then by 2027 we should start seeing the wide FOV versions of the S&B 6-36 showing up, but if it was after 2006 then it may be longer. Again, I am not sure that anyone knows for certain and their is no certainty on how soon European mfr's will begin shipping any kind of wide FOV oculars in their scopes to the US.
It is not wise to bank on what "might" happen but rather capitalize on what we have today and we have a lot of amazing scopes to choose from regardless of FOV limitations.
