The World of Warcraft logo is trademarked. it can be used for personal usage as long as the trademark notice is included but cannot be used for commercial gain without express permission.
A word or title is usually not able to be copyrighted. However, it could be Trademarked.
Yes.
No
The word "Coldplay"is probably trademarked as a name.
If it is a logo or name that you have designed and it goes outside of the state- is technically trademarked and protected under the common law?
No, it is not permissible to use a trademarked logo for personal use without permission from the owner of the trademark.
Of Course it is.
No, it is generally not permissible to use a trademarked logo on a personal shirt without permission from the trademark owner.
Slogans are typically trademarked, not copyrighted. Trademarks protect words, phrases, or symbols that identify a product or service, while copyrights protect original creative works like books or music.
Yes, they can.
Yes, but if your have not registered your company's logo with the trademark office, your logo can never be trademarked once you have used it and sold products with this logo. If you don't want another company copying or using a very similar logo, then I suggest you have it trademarked.
Ping-Pong was trademarked on 20 September 1900.