The following reasons are grounds for opposition to be granted: 

• A similar mark was registered earlier
• The mark is a description of the product’s intended purpose, value or other characteristics
• It is difficult to see the distinctiveness of the mark
• Breach of copy
• The mark violated the rights of famous marks
• Violation of Article 6septies or Article 8 of the Paris Convention
• Unauthorized use of protected emblems, flags and insignia