Please find below response to your queries.
a) Is company registration is different from product registration? They share the same name!
Company registration comes under companies act. However, product registration
b) If Person X with no experience in my line of business applies for a Trademark WONDERTHREAD, would he be granted with the Trademark?
Experience doesn't really matter. Trademark registration can be applied based on two provisions 1) date of intention to use (future) and 2) Already using. Any individual / company / ltd company can apply for trademark registration.
Still you have chance to apply, we can help you in this regard.
c) If indeed he is granted with the trademark WONDERTHREAD, can he file a case against me for trademark infringement?
You can definitely oppose or object for the trademark registration. We can help you with more options
For more details contact
Trademark Attorney & IP Lawyer
IP Lex Global Services