http://en.wikipedia.org/wiki/Secondary_liabilitySecondary liability, or indirect infringement, arises when a party materially contributes to, facilitates, induces or is otherwise responsible for directly infringing acts carried out by another party.
The US has statutorily codified secondary liability rules for trademarks and patents;
however, for matters relating to copyright, this has solely been a product of case law developments. In other words, courts - rather than Congress - have been the primary developers of theories and policies concerning secondary liability.We have three court cases here.
COURT RULING: Nintendo v. Tengen, Tengen Tetris infringing copyright but NOT ILLEGAL
COURT RULING: Rambus v. Nvidia, Nvidia cards infringing patents but NOT ILLEGAL
FELONY INDICTMENT:

v. Ultracade, Multigames allegedly infringing copyright but are NOT ILLEGAL?
And now, 60-in-1, the only case that has not been involved in any court proceedings everyone knows IS ILLEGAL??!?!
Lalelilulelo....
By the way, I cracked my 450-in-1 last night so I can add more games. It's very tedious to add ROMs as it uses whole image of a name instead of fonts, plus the names are encrypted, but it's easy to crack it - it's just alphabet jump table that has constant and predefined one-to-one relation with itself. If anyone wants to know more and if that is ok with the forum rules, feel free to ask.
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Vicarious liability
- The landmark case on vicarious liability for sales of counterfeit recordings is Shapiro, Bernstein and Co. v. H.L. Green Co.[2] In Shapiro, the court was faced with a copyright infringement suit against the owner of a chain of department stores where a concessionaire was selling counterfeit recordings. The Shapiro court ultimately imposed liability, even though the defendant was unaware of the infringement, reasoning that the store proprietor had the power to cease the conduct of the concessionaire,
and because the proprietor obtained direct financial benefit from the infringement.
Contributory liability
- Contributory liability or contributory infringement has been widely defined as a form of liability on the part of someone who is not directly infringing but nevertheless is making contributions to the infringing acts of others.
Material contributions to the act (or enabling thereof), as well as knowledge of the act itself, are key elements of contributory liability.
http://en.wikipedia.org/wiki/Secondary_liability