Square Enix have applied for a US trademark for Dragon Quest Wars, as you can see here:
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Thank you for your request. Here are the latest results from the TARR web server.
This page was generated by the TARR system on 2009-04-28 06:43:31 ET
Serial Number: 77720468 Assignment Information Trademark Document Retrieval
Registration Number: (NOT AVAILABLE)
Mark
(words only): DRAGON QUEST WARS
Standard Character claim: Yes
Current Status: Newly filed application, not yet assigned to an examining attorney.
Date of Status: 2009-04-27
Filing Date: 2009-04-23
Transformed into a National Application: No
Registration Date: (DATE NOT AVAILABLE)
Register: Principal
Law Office Assigned: (NOT AVAILABLE)
http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=77720468
