Purple grenadier Purple grenadier The purple grenadier ("Uraeginthus ianthinogaster") is a common species of estrildid finch found in eastern Africa. The length averages 13.3 cm (5.25 in). All ages and sexes have a black tail, and adults have a red bill. The male has a cinnamon-colored head and neck with a blue patch surrounding the eye. The rump is purplish blue and the underparts are violet-blue with variable rufous patches. The female is smaller and mostly cinnamon brown with white barring on the underparts and silver-blue eyepatches. Juveniles are like females, but mostly unbarred tawny-brown with a reddish-brown bill. The song (in
Colour trade mark 1425 (TTAB 2007), the purple colour was considered functional for coated abrasives, because “[i]n the field of coated abrasives, color serves a myriad of functions, including color coding, and the need to color code lends support for the basic finding that color, including purple, is functional in the field of coated abrasives having paper or cloth backing.” Saint-Gobain Corp. v. 3M Co., 90 USPQ2d 1425, 1447 (TTAB 2007). The Trademark Trial and Appeal Board, in In re Ferris Corp., 59 USPQ2d 1587 (TTAB 2000), held that the colour pink for wound dressings was functional and not registrable, as its colour