What is a Patent Family?
Understanding patent families—how related patents link across jurisdictions and why family analysis matters.
Definition
A patent family is a group of related patents filed in different countries (or as continuations/divisionals) that share a common priority application. Family members protect the same invention across multiple jurisdictions.
Types of Patent Families
- Simple (INPADOC) family: All patents sharing the same priority document(s)
- Extended family: Includes patents sharing any common priority, even indirectly
- PCT family: Patents originating from a single PCT application entering national phases
- Continuation/divisional family: Related US applications sharing the same parent
Why Family Analysis Matters
Understanding patent families is important for:
- Geographic coverage: See where an invention is protected worldwide
- Avoiding duplication: When analyzing portfolios, count families, not individual patents
- Prior art: One family member can be prior art against others
- Licensing: Licenses should address all relevant family members
- Portfolio valuation: Family size is an indicator of patent importance
Family Analysis with AI
AI helps with family analysis by:
- Automatically linking family members across 150+ patent offices
- Visualizing family trees showing relationships between members
- Tracking legal status across all jurisdictions
- Identifying family members that may be relevant to FTO or licensing
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