The following can be grounds for cancellation:
- bad faith
- the mark is generic
- the mark is descriptive
- expired registration
- the mark is misleading, deceptive or disparaging
- the mark is functional
- use of protected armorial bearings, flags and other State emblems
- use of a geographical indication
- inclusion of a badge or emblem of particular public interest
- express renunciation by the owner
- unused trademark for five consecutive years
- the mark is contradictory to public policy or principles of morality
- registration was declared as invalid by a competent authority
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