As subs, Apus and I have to be careful about the use of genericised trademarks in our publication. For example, our writers shouldn't refer to 'hoovers' when they mean vacuum cleaners in general - the manufacturer Hoover is liable to get cross at this misuse of its trademark and write us a stern letter.
Leaving these genericised trademarks in the magazine is unlikely to get us sued, but it could damage our relations with the companies in question. And we get enough stern letters as it is.
One genericised trademark that had me stumped recently was Velcro – if we can't refer to 'velcro' as a generic, what should we call this type of product? The OED, for once, wasn't much use. The answer came via Wikipedia - Velcro, apparently, is a specific brand of "fabric hook-and-loop fastener".
Wikipedia also has a comprehensive list of genericised trademarks – many of which are country or region-specific.