F21W INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
Introduced: January 2000
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.
Title
Titles differ between systems:
IPC: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES , , and , RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
CPC: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
Full Title
Full titles differ between systems:
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES , , and , RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
Of 18 combined children, 0 exist in both systems.
9 codes are CPC-only extensions, 9 exist only in IPC.
Note: 9 CPC extensions are marked as secondary classification only.
IPC defines codes here since 2000.
Child Classifications
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- F21W 102/00 Exterior vehicle lighting devices for illuminating purposes since 2018 −4 IPC IPC only IPC only
- F21W 103/00 Exterior vehicle lighting devices for signalling purposes since 2018 −10 IPC IPC only IPC only
- F21W 107/00 Use or application of lighting devices on or in particular types of vehicles since 2018 −3 IPC IPC only IPC only
- F21W 111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in groups since 2000 −5 IPC IPC only IPC only
- F21W 121/00 Use or application of lighting devices or systems for decorative purposes, not provided for in groups since 2000 −3 IPC IPC only IPC only
- F21W 131/00 Use or application of lighting devices or systems not provided for in groups since 2000 −4 IPC IPC only IPC only
- F21W 2102/00 Exterior vehicle lighting devices for illuminating purposes 2nd only +4 CPC CPC only CPC only
- F21W 2103/00 Exterior vehicle lighting devices for signalling purposes 2nd only +10 CPC CPC only CPC only
- F21W 2105/00 Combinations of lighting devices covered by codes F21W2102/00 – F21W2104/00 2nd only CPC only CPC only
- F21W 2107/00 Use or application of lighting devices on or in particular types of vehicles 2nd only +3 CPC CPC only CPC only
- F21W 2111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 2nd only +5 CPC CPC only CPC only
- F21W 2121/00 Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00 2nd only +7 CPC CPC only CPC only
- F21W 2131/00 Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00 2nd only +4 CPC CPC only CPC only