Is it legal for me to buy a book and resell bits and pieces of it (artwork or poems for example)? For example, I take a poetry book and cut out the poems, frame them, and sell them individually. Or I take a book with Star Wars™ art and cut out the pictures and decoupage a dresser and offer it for sale. What intellectual property principles are implicated?
This question has been addressed directly, with very similar facts, by the federal courts, and the answer, based on those decisions, is: Maybe. The most famous case in this area is Mirage Editions v. Albuquerque A.R.T. Co., 856 F.2d 1341 (9th Cir. 1988). In that case, the defendant had bought a copy of plaintiff's art book, cut out the pages, and affixed them to ceramic tiles, which it sold. The defendant relied on the first sale doctrine, codified in 17 U.S.C. 109. The first sale doctrine says that if you own a copy of a copyrighted work, you can resell it without the copyright holder's permission. The plaintiff argued that, by altering the original artwork, the defendant had created a new derivative work. The first sale doctrine gives you the right to sell the book to someone else, but not the right to create derivative works, whether by writing and publishing an unauthorized sequel or, they argued, cutting and pasting and tiling and kilning the physical pages. The Mirage Editions court agreed with the plaintiff that the tiles were a derivative work outside the scope of the first sale doctrine, and therefore the defendants had infringed the plaintiffs' copyrights. However, other courts faced with similar facts have disagreed, and to date I'm not aware of any Supreme Court decision resolving the issue. The bottom line is: you are allowed to sell what you bought; you aren't allowed to transform it into something new and sell that. Where the line gets drawn is muddy and likely to remain so at least until the Supreme Court addresses the issue.
You are creating a derivative work. You are only allowed to do this if the library comes with a license that allows this. If you want to give your derivative work to anyone else, copying it is copyright infringement unless the license allows it. Copying the derivative work and attaching a different license is most likely to be copyright infringement. And if people receive a copy with an open source license that is not justified and rely on it, that’s creating one unholy legal mess for everyone involved and can be massively more expensive than plain copyright infringement. No license means you don’t have permission to do anything with it, not creating derivative work, not distributing it, and certainly not publish it with an open source license.
Yes. The copyright owner of a work has the exclusive right to "reproduce the copyrighted work" or to make "derivative works" of it. 17 USC 106. Copyright law is older than the photocopier, and it applies to copies made by means of any technology. If your intent is to duplicate the protected work, whether you do it by tracing, photocopying, or even freehand, you are infringing that right. It is possible that you could squeeze into one of the copyright exceptions, such as fair use, but these are much narrower than people tend to assume they are (especially outside of the U.S.), and they boil down to: "Well, yes, I copied your copyrighted work, but..." The bottom line is: is it copyrighted? Did you copy it, in whole or in part? Then, unless you have a very good reason, you've infringed the copyright. Whether you do it by means of tracing paper, jellygraph, or iPhone doesn't matter.
Broadly speaking, the difference is the "sharealike" clause of CC-BY-SA. Any derivative of a CC-BY-SA work must itself be licensed CC-BY-SA, whereas a derivative of an "MIT with attribution" work can be under any license the author wants. There are a number of other differences in the fine print (eg. CC forbids DRM, where MIT doesn't), but that's the big one.
There is nothing illegal with doing this (absent specific contractual terms or industry regulations to the contrary in particular cases, e.g. in the case of export controlled high technology products). This is called operating a wholesale business or operating as a broker. Lots of legitimate legal businesses have this business model.
In my opinion, you are totally free to publish the information. There are two areas of law that can be cosidered - private and public law. In the private law area, you can be liable for revealing trade secrets, but only if you agreed to keep them by a contract. Trade secrets do not exist by themselves (there are minor exceptions, eg. in competition law, but those do not concern us), they must be protected by contracts. Another private limitations, like libel laws, won't apply here. This is not uncommon, but not in cars - you can find clauses like these in software license agreements. Then there is the public area. Is there any regulation, any policy of the state, that prevents you from publishing it? I am not aware you whole legal code of your state, but I doubt there is. It would be a harsh limitation of freedom of speech. Even if the modification could lead to illegal effect (like, modifying toy weapon to kill by rising its power...) it would be only illegal under very rare circumstances. To conclude it - freedom of speech can be limited only if there is sufficient public interest to do so, and I don't see any.
Ideas (methods of playing, game mechanics, strategy, goals) cannot be protected by copyright. But any part of a creative work can. So, no copying of drawings, patterns, images, sounds, or the element. I suppose copying the software code is not an issue here, but it can, obviously, also not be copied. And nothing in your game can look like someone's else trademark.
A copyright can be divided into as many pieces as the owners choose. Initially, all authors have a share m(an equal share unless they have an agreement on some other share arrangement), But each author (or later owner) can leave the copyright to multiple heirs, in equal or unequal shares. Each owner can sell all or part of the copyright (or usage rights) to one or more new owners. Under US law, any co-owner may permit a copy (or copies) to be made, or may grant a non-exclusive license. However, the co-owner doing this must account to the other co-owners for any profits made, and share them according to whatever agreement the co-owners may have (by share if there is no other agreement). But to grant an exclusive license, all co-owners must agree. The law in many other countries is different. In some countries, a majority of owners (by share usually) must agree to grant even a non-exclusive license. The co-owners may make an agreement to limit granting of licenses to some particular owner or representative or to require wider consent than a single co-owner.