If a trademark can be registered under multiple class for eg. under class 9, 16, 35, 36, can we file a single application for the mark for multiple classes.
What will be the case, if the trademark officer rejects registration under any one class and approves under other classes?
You can only file one trademark either in one or multiple class. Trademark Act provides only multi-class application not multiple-mark application. So, you have to file label and work mark application separetely.