In reply to Tom Last:
Intellectual Property Rights (IPR), such as trade-marks, can be specific to a particular sector. The Parsec trade-mark might just be for "outdoor equipment / sleeping goods" etc.
Incidentally, IPR trials in trademark disputes look at previous efforts to maintain brand names. Whenever you hear of a tiny burger bar, say in in Inverness, called McDonalds being sued by "the" McDonalds it's generally not because the US giant feels vindictive and threatened. It is because to defend an IPR case, a history of vigorous defence of the brand-name has to be shown: fighting every infringement, So, when a huge corporate "bullies" a small trader, it is generally a demonstration of commitment to theit trademarked name, in advance of possible future disputes with major rivals, rather than aimed at the small trader in particular.