[Mithaldu]

If it's close enough 37S could have a trademark case there.

[hlmencken]

a. they don't have it trademarked. b. copyright protection is not available for titles of works

[Navarr]

Trademarks exist without registration, though with limited protections

[briandear]

These guys do though: http://tmsearch.uspto.gov/bin/showfield?f=doc&state=4806:xod...

[drivers99]

"This search session has expired" is what I get.