as i understand it if you are in the same class as the trademark you will have problems, if you are not then you shouldn't
if its a very important decision then you need to talk to someone like erhan ( coopers....) before you go waste alot of time and money.
tim
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story:
@ 6 years ago i had a domain, i built it and it was in the same sector as a competitor with a VERY similar name, i had to give it up.
the competitor then didn't reregister it and now its owned by someone else but they are not using it in direct competition with the guys that tried to sue me did, so they haven't hassled him and probably never will i suspect as the new owner would win IMO.
tim