- via Paris Convention : 12 months from earliest priority date.
- via Nationalization of PCT : 31 months from earliest priority date.
- Validation of European Patent in EPO member states: 3 months from the date of European patent grant
- Bulgarian invention patent application authorization and annual fee instructions
- Is a Bulgarian utility model application convertible?
- Whether the Bulgarian invention patent application can be type-converted
- Features of the Bulgarian invention patent application process
- How long is the protection period of industrial design in Bulgaria?
- Bulgarian utility model application authorization and annual fee instructions
- Is a utility model application in Bulgaria eligible for DAS?
- How long is the protection period for utility model applications in Bulgaria?
- Which is the competent authority for utility model applications in Bulgaria?
- Instructions for Authorization of Industrial Design and Annual Fees in Bulgaria