What should I do with a patent infringement letter?

You should hire a competent patent attorney to look at the specific facts. Also preserve all evidence of what you were selling in 2002. If it is...

Is my business name similar enough to be trademark infringement?

In addition to the above answers, which are correct, note that trademark and service mark rights are primarily "common law" rights that start based...

How do I know if someone has grounds for a trademark/copyright infringement against my business?

If they threatened you with a "trademark/copyright" lawsuit, understand that they are not the same thing, but they might be complementary. You can...

Patent Infringements

You definitely need a patent attorney familiar with interpreting patent infringement situations -- if you are making, using or selling your...

Is it trademark infringement to put together two solid color bracelets to create team colors?

The above answers are all good ones. I also observe that you don't exactly say what you will be saying or displaying to encourage the customers to...

Who has the legal right to use a name of an industry lobby group when two different parties are using the exact same name?

Trademark rights generally, but not exclusively, apply to commercial use. The US recognizes common law trademark rights arising from use, even...

Some of those questions have complex answers. You may want to consult with your own attorney to weigh the possibilities under attorney client...

A private limited company share the same name as my stage name "PHARAOH LONDON". This company located in London. They don't seem

In addition to the above remarks, note that trademark law is "national". There are more similarities between the US and UK because both have...

This is one where you probably need your own lawyer and have he or she give you an opinion based on your specific facts. That way there will be...

Trademark intrusion possible obstical.

No disagreement with the other answers. A few remarks. The specific facts will be critically important. If (1) you think you used first and (2)...