> EDIT (March 2, 2018): It appears that there are multiple "GTX Corps", so I want to make it clear that the ones going after us don't have much of an online presence

IANAL, just was curious about the identity and did some amateur sleuthing. Results below...

The GTX Corp in Wikipedia seems like a real trading company but there is a couple of odd things about it. It's a public company made of 7 (seven) people; they have tracking products and 80 patents. Theoretically, it could be that they supplement the legit business with patent trolling. But yes, it's not very likely.

So I went to look up the patent info instead. If you google "US patent 7,177,838", you see that it's somewhat of a holy grail for the patent trolls. It was used to sue Amazon, Apple, Visa, News Corp, Starbucks, and the whole alphabet of multinationals. Many of these settled, as the lawyer of Playsaurus mentioned. The name of the suing entity was Actus, LLC (https://www.socialgameslaw.com/2010/06/actus-sues-for-virtua..., https://www.law360.com/articles/124471/apple-amazon-out-of-a..., https://www.law360.com/articles/165880/visa-m-t-bank-resolve...). They don't seem to have any presence online, although there is a website for Actus (http://www.actus.company) but even though it looks like a front for foreign intelligence operations, it does not seem to have anything in common with that Actus.

The patent public record is here: https://patents.google.com/patent/US7177838B1/en?oq=7%2c177%.... It contains a history of assignments, giving a clue to what GTX actually is.

The first re-assignee was GTX Corporation (Arizona). The current one is GTX Corporation (California). Between that, it was PayByClick and Actus, which is when the mega-suits were filed. It seems improbable that the two GTX companies are completely different.

The search in the California register turned nothing meaningful (https://businesssearch.sos.ca.gov/CBS/SearchResults?SearchTy...). It's either the entities are named somewhat differently or dissolved.

The search in Arizona, on the other hand, produced interesting results. This is the right GTX: http://ecorp.azcc.gov/Details/Corp?corpId=F00380025. Founded in 1987, business type: technology. Details below.

The patent was filed by Marvin Ling on Jan 26, 2000. Already in May it was reassigned to GTX. A family or an acquaintance? Let's see: the current CEO is Andrew Ling. From the foundation until 2008, however, the president was Marvin Ling, including the year 2000 when the patent was filed and reassigned. Andrew Ling appears to be a lawyer in Arizona; his LinkedIn profile confirms that he is the right person: https://www.linkedin.com/in/andrewlingattorney. And the website actually exists where it's supposed to be, just not liked by Google: http://www.gtx.com/about/press/aml_president_pr.asp.

The patent itself was reassigned to Pay By Click (sounds like an entity materially interested in the patent) in 2002, after which the annual report filing became irregular. In 2005, GTX received a notice with a threat of the license revocation; same happened in 2013 and 2014. It became better after that which coincided with the reassignment of the patent.

Summary. It looks like it's not a proxy set up by lawyers to sue. It appears to be an old family business which was dormant for a while and now wants to capitalise on an old patent that either someone else or a different structure used to shake down a few giants.

While the GTX is registered in Arizona where its owners live, it seems to be a Delaware corporation. I don't understand why they hired a law firm in Boston to threaten a company in California. The guy is a lawyer; does it mean he is not serious about the lawsuit? Does he expect you to haggle and offer, Russell Peters style, $34,500 as the last price?

Good luck.