This appears to be the same list as from the Caribou Coffee case (brief). So far, I've read through three of them. I read the first one: '559, one which didn't fit the same pattern: '646, and the oldest: '397.
'559 is one of the patents which they are asserting that business are definitely violating because they're using WiFi. If you read the text of this patent, there are a large number of diagrams and descriptions of a very specific wireless sensor network system, which may, in fact, be novel. However, when you read the claims, they're sufficiently broadly written that they cover almost any wireless network. So on its face, it might look like they have a case. Except that this patent was filed in 2001. That was way, way after 802.11 was codified and consumer products using the patented techniques were already on the market. It's even written so broadly that it would cover AlohaNet, which went into operation in 1971. As such, prior art for this patent is obvious and it should be invalidated.
A large number of the patents in their suing portfolio would seem to match the same profile as '559 since in the lawsuits they're specifically claiming that they know for sure that the businesses are violating them despite not even knowing which particular type of access point those businesses are using. Many of the patents in the lawsuit are more recent than '559 and the plaintiffs are effectively claiming that they cover all WiFi devices. Any such patent should clearly be invalidated based on prior art.
There are also a few which they only claim that discovery will allow them find is being violated. I read one of the newer ones, '646, and the oldest one, '397.
By contrast to '559, the oldest patent: '397 is less clearly invalid. Filed in 1994, it's a patent for a wireless access point which uses two radios to ensure higher reliability. The claims leave out any specific requirement of the purpose of the second radio and so just cover any wireless access point with two radios. They're hoping that their discovery will show that some of the access points in use have two radios. Although it's quite possible that prior art exists (and likely, I would guess), it's not so easy and obvious that it shows up in a simple Google search. But someone more familiar with the history of WLAN devices may well be able to identify a dual-radio device from before 1994. Even if no such device exists, the novelty of the invention seems to be its primary weakness. Given that devices with one radio existed and that certain people were already using two radios for redundancy by using two different devices, is it really that novel to just include two radios in one device? If it were my choice, I would rule it obvious. But both courts and the patent office have been very reluctant to overturn patents based on lack of novelty. So I suspect that this one will hinge on whether or not they can find prior art.
The last patent I read, '646 is a newer patent that they also claim that discovery will show whether or not the defendants are violating it. It's a newer patent, but unlike the other one doesn't cover WiFi in general. It has a huge number of claims (270), but all of them are based on claims 1, 15, 87, 144, 145, 216, so reading those doesn't take too long. They all claim a system in which wireless node go into sleep mode and the periodically wake up to check to see if there are pending messages for them. This, very simply, is not how WiFi works. It clearly is not applicable to any existing WiFi devices. I haven't looked into the prior art situation because it's clear that the defendants aren't violating the patent.
So, from a survey of three of the claimed patents, my guess is that they're trying a "throw shit at the wall and see what sticks approach". The plaintiffs clearly don't understand all of their own patents or they would've left '559 and '646 out entirely because they have no chance on winning with those patents (unless they can find someone the courts accept as a technical expert and who has such a poor understanding of WiFi and/or patent '646 that he'll claim that it applies). On the overall, I'll be curious to see how this actually turns out, but it's obvious that, on their face, many of the plaintiffs claims are untrue.