- via Paris Convention : 12 months from earliest priority date.
- via Nationalization of PCT : 31 months from earliest priority date.
- Novelty grace period for patent applications for inventions in Bulgaria
- Novelty grace period for utility model applications in Bulgaria
- Instructions for Authorization of Industrial Design and Annual Fees in Bulgaria
- Bulgarian utility model application authorization and annual fee instructions
- Features of Bulgarian Utility Model Patent Application Process
- Is a Bulgarian industrial design application eligible for DAS?
- How long is the PCT period for Bulgarian invention patent application
- How long is the application period for industrial design in Bulgaria?
- Novelty grace period for industrial design applications in Bulgaria
- Can the priority right of utility model application be restored in Bulgaria?