[dba-Tech] (a bit of) OT: Registered trademarks worldwide search

[Salakhetdinov Shamil]

Hi All --

Sorry for OT - I'm looking for a website where I can check worldwide registered trademarks for my friends who are currently organizing a business to not have their trademark collision with existing one(s).

I have found this web site 

https://trademarks.justia.com/search?q=Microsoft  

is it a good source for trademarks probable collisions investigation?

Thank you.

-- Shamil