What should I do after receiving a notice of copyright infringement?

Don't delete anything until the problem is solved. Write down who you called and what they told you. Go to your operating system Programs...

Can I create a company that's intended to poke fun at a hugely successful company?

Without problems? If you consider having to defend a lawsuit a problem probably not. If winning it solves the problem, maybe. One court said: "A...

Can a postcard mailed before 1923 be used for commercial use? ?

As the above answer points out, it's probably public domain but there might be important factual nuances.

Can I trademark a name for a blog that already exists, but is not trademarked yet?

If it's a distinctive name, what you describe is that the competitor already has common law trademark rights. If it's generic - Weekly Travel Blog...

If you're sure there is no patent application pending you could explore a quick tam action, but it's probably an uphill battle. It looks like you...

I created a derivative work of fan art, someone copied my derivative work and entered it into a fan art contest, can I dispute?

You're going to have to consult with a lawyer to get a confidential opinion. The problem is that you have admitted, publicly, that you have...

Will my US company get sued? What is the liability and legal consequences? How do I protect myself?

Avvo is not the place to get advice on specific fact situations. You should retain a lawyer and get a confidential opinion. Generally,...

There's an old lawyer joke. A fellow hires a plumber who comes over to remedy a stopped drain. He spends 15 minutes, clears the drain and...

If they are unauthorized copies the fact that you get them from Scribd doesn't "immunize" you. You certainly would want to republish them and...

Would this be some sort of copyright or trademark infringement? (ART LEGAL ADVICE)

It sounds like if you are creating three dimensional versions of two dimensional characters you would be creating unauthorized derivative works and...