US trademark Office has received a trademark for Subaru RS as of March 22, 2011.
http://tess2.uspto.gov/
I can't do a direct link to the trademark, but here is a screenshot.
Word Mark SUBARU RS
Translations The English translation of the foreign word(s) in the mark is: The English translation of the word "SUBARU" in the mark is "PLEIADES".
Goods and Services IC 012. US 019 021 023 031 035 044. G & S:
Automobiles and structural parts and structural fittings therefor
Standard Characters Claimed
Mark Drawing Code (4) STANDARD CHARACTER MARK
Serial Number 79096990
Filing Date March 22, 2011
Current Filing Basis 66A
Original Filing Basis 66A
International Registration Number 1076024
Owner (APPLICANT) FUJI JUKOGYO KABUSHIKI KAISHA also trading as Fuji Heavy Industries Ltd. CORPORATION JAPAN 7-2, Nishi-Shinjuku 1-Chome Shinjuku-ku; Tokyo 160-8316 JAPAN
Priority Date March 22, 2011
Type of Mark TRADEMARK
Register PRINCIPAL
Live/Dead Indicator LIVE