1. I used a trademarked word, nine times.
I mention the use of an operating system used today and how it evolves in my novel, <Linux, for those familiar with the term> its trademarked under creator Linus Torvalds. Now, Is it okay for me to do this or do I have to ask Mr Torvalds on the use of his OS's name? <I use other OS's too Unix, etc, do I gotta ask Bell Labs about those?>
2. I quote once from Thus Spoke Zarathustra? Do I have to ask permission to use that quote as well?
[This message has been edited by slade007 (edited July 03, 2003).]
Also, as long as you say nice things about the product, of course.
Quoting anything else but music lyrics is probably okay under "fair use" as long as you don't have a huge quote, and as long as you credit it somewhere (preferably have the character who actually does the quoting say where it's from).
For music lyrics, you need permission--from whomever owns the copyright (not necessarily the lyricist).
It is a good plan to acknowledge them, but that doesn't mean you have to put 'tm' next to them in the text - a page in the front or the back of the book where you list them and say whose property they are is usually acceptable.
I'm not a lawyer, but I know a few good ones... :-)
As for the Nietsche - I'm sure copyright on his original work has expired by now - however, you may need permission from any English language translation you quote from. It all depends on how extensive the quote is. I actually wouldn't think you would need permission for a single line. But *do* research the issue further - contact the publisher of the edition you'd like to quote from. May take a while to get a response, though.
Linux is a registered trademark of Linus Torvalds
He has never actually sued anyone for infringement, and will only do so in a truly egregious case. (This does not, in and of itself, cause him to loose the trademark -- that would only hapen if people started calling BSD or something "Linux" and he did nothing)
You don't need permission to call a product by its name in accurate writing about it (your characters can run Linux and eat at McDonalds while drinking Jolt all they like)
If you directly contradict fact (e.g. have your character contribute an O(1) scheduler, when you character in no way resembles the actual author), some people could get upset, though I doubt they'd have grounds to sue.
If your writing is defamatory (eg you call Linux unstable because of all the stolen SCO code in it) and everything else in your story is highly realistic and well researched, you'd be on shakier legal ground, but Linus won't bother you.
UNIX is a registered trademark of the X/Open group, though Apple is fighting to have it revoked. IMHO, they have a strong case and are likely to win.
Copyrights don't expire. They did until 1922. Anything before that is public domain. Anything after is copyrighted -- forever. Check out the supreme court case Eldred vs. Ashcroft. (All this is U.S.A. only, and could be changed if congress stopped being Disney's pawn -- viva la revolution)
Short sections of work can be quoted as fair use. If your characters don't site them, it's good form to through a proper citation into the front matter.
Hope this Helps,
I do understand the idea of companies not wanting their brand names to degenerate into common usage and basically negating their trademarks, but surely there's a middle ground here.