Other posters seem to have covered the main items, but just to remind you that copyright and trademark can differ in subtle ways from one country to another. I'm not sure about trademark, but an example on copyright is differences in copyright lengths. For example, while Canada and the US are both signatories to the Berne Convention on copyright and their respective national copyright laws meet the requirements of that convention, IIRC, the US recently enacted legislation to extend the period of copyright further. So it's entirely possible for something to be copyright in the US but not in Canada. As for trademark, to the best of my knowledge, trademarks must be registered in each nation where you do business; if you don't, you can't claim infringement in that country. As with others, I am by no means a lawyer so get professional advice, but if you anticipate doing business outside your home country, it's another question to ask.
ETA: Something else - I don't know about the US, but I'm reasonably certain that in Canada, trademarks have to be registered on a province-by-province basis, for example. This is why intellectual property lawyers make bucketloads of money :-)
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timeasmymeasure
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Date: 2012-04-27 12:35 am (UTC)ETA: Something else - I don't know about the US, but I'm reasonably certain that in Canada, trademarks have to be registered on a province-by-province basis, for example. This is why intellectual property lawyers make bucketloads of money :-)