Can someone sue me for using an un-trademarked name?

Your question suggests you don't know the difference between a trademark and a federal registration. Just because a mark is not federally...

The short answer is there is only one way to know for sure: file a trademark registration application and find out. If you want to know for...

The short answer is a provisional patent application doesn't do anything that you think it does. A provisional does not protect you against...

What are the differences in legal protection between a Registered "R" Trademark, and a Trademark "TM"?

A lot of people share your confusion. The (TM) means that the mark is being used as a trademark. You are free to use the TM on anything you want...

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Fair Use Exemption v. Expressed Writen Consent

Just because the NBA might not object to a few highlight clips posted on YouTube does not mean they care nothing for their copyrights. In other...

Use of video clip in online biography

Certainly, CBS owns the rights to that interview and will undoubtedly come after you if you are even remotely successful using it to sell your own...

Would this be fair use?

I feel highly confident that the use you plan to make, which sounds purely academic, would constitue fair use. But to be safe, you should finish...

For a new company logo do I have to register it for trademark before using it on my website and such?

There is no need to register a trademark before you use it. It might be a good idea, but only if you are going to get a substantial time...

NO, you should not do that. The reason you can't find T-shirts with that logo is because Microsoft owns that logo and no one else can sell...

I want to publish a book of 200 of my favorite quotes

So long as your paintings are in fact original works, and not just painted versions of someone else's copyrighted photographs, then you should be...