F21W INDEXING SCHEME ASSOCIATED WITH SUBCLASSES , , and , RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
Introduced: January 2000
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- LIGHTING
- Subclass:
- INDEXING SCHEME ASSOCIATED WITH SUBCLASSES , , and , RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
Description
F21W is an indexing classification that organizes lighting inventions according to their specific uses and applications rather than technical construction. It serves as a supplementary classification tool to cross-reference inventions covered in F21 lighting subclasses by their functional purpose or field of use (such as emergency lighting, decorative lighting, or specialized industrial applications). This scheme facilitates retrieval of lighting patents based on application context, complementing the structural classifications found in other F21 subclasses. Examiners and searchers use F21W codes alongside primary F21 classifications to ensure comprehensive prior art searches and precise patent positioning.
9 direct subcodes
Child Classifications
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- F21W 102/00 Exterior vehicle lighting devices for illuminating purposes
- F21W 103/00 Exterior vehicle lighting devices for signalling purposes
- F21W 104/00 Exterior vehicle lighting devices for decorative purposes
- F21W 105/00 Combinations of lighting devices covered by groups
- F21W 106/00 Interior vehicle lighting devices
- F21W 107/00 Use or application of lighting devices on or in particular types of vehicles
- F21W 111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in groups
- F21W 121/00 Use or application of lighting devices or systems for decorative purposes, not provided for in groups
- F21W 131/00 Use or application of lighting devices or systems not provided for in groups