Trade Name, Trademark, Service Mark

What is the difference between a Trade Name, Trademark, and a Service Mark?
What are the trademark and service mark classifications?
What are specimens for trademarks and service marks?
What is acceptable identification of goods and services?  (U.S. Patent and Trademark Office)
Does registering my trade name with the Department mean that I own that trade name?
If registering my trade name does not give me ownership rights, why should I bother with registering the name at all?
Will the Department check to make sure that no one else is using the same name that I want to use?
If more than one person has chosen the same (or very similar) trade name, who has ownership of the name?
If I have checked and found no use of the name I want in the State but have also found a registration for that name, can I get the Department to revoke the earlier registration?
If I want to register a trade name that I have been using for a while and find that someone else has already registered that name, can I get that registration revoked?
If my registration is accepted, how long is that registration valid?
Is there a difference between a corporate name and a trade name?
How do I cancel my trade name, trademark or service mark registration?