Case T-90/05: Judgment of the Court of First Instance of 6 November 2007 — Omega v OHIM — Omega Engineering (Ω OMEGA) (Community trade mark — Opposition proceedings — Application for the figurative and word Community trade mark Ω OMEGA — Earlier national word mark OMEGA — Relative ground for refusal — Reliance by the applicant for the Community trade mark on a national trade mark identical to that applied for and earlier than the national mark cited in opposition — Likelihood of confusion)