Yes they can, if they belong to a certain company or ownership they can be trademarked.
The purpose of a person doing a registered trademark search is if the person wants to register a trademark of their own. If their action is already trademarked, it cannot be trademarked by another person.
yes it is trademarked by hasbro
Yes. This is a patented, trademarked product.
No it is not trademarked. It is just an extrememly common phrase for weddings mostly, but the phrase itself "save the date" is not trademarked
It is already a movie and a TV series.
Yes. Several instances of "Fortune 500" are trademarked by Time Inc
No
oxymizer
Yes it is.
yesh it isith
nintendo
Ragdoll