This post was first published on June 3, 2011. In a recent case, the Delhi High Court has categorically ruled that registration of a trademark is not prima facie evidence of its validity and thereby has created a slippery slope for most registrants of descriptive and less distinctive marks. The case related to use of the word mark ‘KRISHNA’ in relation to milk and milk products. The Plaintiff, by virtue of prior usership and prior registration claimed a permanent injunction against the…