Yeah. I'm the friend he mentioned. Achaea.com was the first game in the world to use virtual currency/goods as its business model, back in 1997. Still live today. My company's at ironrealms.com. I mailed you offering help.
Wow. I actually remember playing your game when I was 17. I can't remember details about the virtual currency though.
The '838 patent was filed in 2000 (which is the effective date, 2007 is just the processing date). Did Achaea have virtual currency before then? If so, that would help us a lot.
Their patent is for digital tokens ... Clearly rubies are your "unit of currency". Is there any chance it was supposed to be Rubles but was misspelled?
I don't really know the ins and outs of how. I've never been sued by patent trolls. I've been threatened, just responded with some of the evidence I have and a, "Are you sure you really want to do this?" and I never hear from them again.
When I've helped defend other companies (two of which are among the largest/most prominent in the games industry), I've just provided expert witness testimony as to the existence of prior art. I've never had to testify about it in court, so I'm fairly sure that each time the trolls dropped it before going to court.
As to how much it costs - no idea. They had pricey lawyers though, so there's certainly some cost involved. I suppose it depends on how big the balls on the troll are, or perhaps how easily they think the defendant will be intimidated into just settling.
Sorry you got rate-limited in the comments here; it's a restriction that new accounts are subject to because of past abuses. I've marked your account legit so it won't happen again. Welcome to HN. We hope you'll stick around!
The following is not legal advice and should not be construed as such. Short answer is that it really depends on your strategy and the rate of your firm. For example, a colleague of mine works at a top tier firm. They were hired to defend a major auto maker against a troll. They took the case to trial, won and then successfully countersued for repayment of fees. The whole thing took a couple years (patent cases move at a glacial pace), and the lawyers ended up billing the car company for several million dollars. I also don’t know that they were ever able to successfully collect on the countersuit judgement.
Another strategy is to try and invalidate the patent via the USPTO before it goes to trial. This often does work with bogus patents, but it’s still not cheap. I have heard the ballpark figure is $100k.
Play by mail games have you beat by decades. Which is the usual problem with patent claims (good!) and claiming credit for inventing an idea (endless arguments :-))