Date on which the trademark application was filed with TMO?

Logo of delhi metro was applied on 28 August 2017.

Who is the trademark proprietor?

Trademark application was filed by DELHI METRO RAIL CORPORATION.

Trademark application is filed under which trademark class?

Trademark application has been filed under following classes.
34

Trademark application is at what stage of trademark process?

As per IP India, trademark application is on the following stage:
Registered.

What is the Listed Application ID of the Trademark?

Listed application Id of Logo of delhi metro is 3622157.

Who filed the trademark on behalf of the proprietor?

Trademark attorney of the Logo of delhi metro is Lalji Advocates.

Is the Trademark word, color or device mark?

Logo of delhi metro is a DEVICE as per IP India data.