I think this is what you need, Ian

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Third parties may file *oppositions* to trademarks/servicemarks that have been granted.

*unopposed* and *opposition* are the terms of the art in patent/trademark lingo

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Note added at 9 mins (2005-06-13 12:11:53 GMT)
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Sorry, I didn\'t complete my explanation. Such challenges aim to either prevent the granting of a patent/trademark etc. or to undo or restrict it.

Here are the URLs of some important patent offices:

http://www.dpma.de/index.htm

http://www.european-patent-office.org/index.en.php

http://www.uspto.gov/



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Note added at 1 hr 12 mins (2005-06-13 13:14:51 GMT)
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Marke=trademark (_not_ brand or the like)

ergo:

*The owner of the trademark does not warrant that it is/will remain unopposed unless it has been registered in a manner precluding further opposition.*

hth :-)