Slashdot | Microsoft to sue Mike Rowe for Copyrights:
Re:*Trademark* not Copyright
(Score:5, Informative)(http://godsexboyfriend.com/ | Last Journal: Saturday January 03, @09:42AM)
Copyright - literally "the right to copy" - Covers a particular creative expression of an idea, such as a song, a movie, a poem, or a C++ program. Currently lasts longer than any of us will live.
Trademark - literally "a mark used in trade" - Covers names, slogans, logos, and such when used in the packaging and marketing of a product or service. Lasts as long and only as long as it's in active use.
Patent - literally "openly disclosed" - Gives temporary exclusive rights to a invention [insert debate over definition of "invention" here] in exchange for publishing the details of how it works. Currently lasts longer than the technology is likely to be useful.
(The so-called fourth kind of IP is a trade secret, which is the opposite of a patent: instead of publishing a how-to, the inventor keeps it private, so they can try to keep exclusivity indefinitely.)
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