TRADEMARKS.

Transblawg links to a trademark checklist of immediate use to those with a professional need to check for trademark status and of interest to the merely curious, like me; as Margaret says, although it is a creation of the International Trademark Association ("of more than 4,300 trademark owners and professionals, from more than 170 countries"), it appears to include only trademarks from English-language countries—it includes, for example, Dual herbicide but not the Dual turntables everybody wanted when I was in college.