Trademarks and service marks are marks, such as comprising words or logos, which symbolize a source of goods and services. By viewing the trademark, a consumer can recognize the source of the goods. Trading off of another's name and goodwill allied with the name is trademark infringement. Even more, using a like name or logo, that is, one in which would confuse a end user, is also trademark infringement.
It is important to know who is using the name earlier than you pour marketing, manufacturing, and legal fees into a name. If your trademark will not stand, then everything you've put into following your name is potentially lost. Still additional, even if you have a domain name or a registered trademark with the india patant and Trademark Office, you still are not assured that you can keep the name.