F21Y INDEXING SCHEME ASSOCIATED WITH SUBCLASSES , , and , RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
Introduced: January 2000
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- LIGHTING
- Subclass:
- INDEXING SCHEME ASSOCIATED WITH SUBCLASSES , , and , RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
Description
F21Y is an indexing classification used to supplement and cross-reference documents related to light sources and light emission characteristics within the F21 lighting branch. It organizes patents by specific attributes such as the physical form of light sources (incandescent, fluorescent, LED, laser) and the color or spectral properties of emitted light. This classification facilitates retrieval and grouping of related technologies that share common source types or light characteristics across multiple primary lighting subclasses. F21Y does not independently classify inventions but serves as an auxiliary tool for systematic indexing and patent family navigation in the lighting field.
Scope Notes
Glossary: Light source Light sources The entity (e.g. light bulb, gas mantle, combustible charge) that generates light for a lighting device or apparatus. The light source of the lighting devices or lighting apparatus may be electrically powered (e.g. power is supplied by electric batteries, electric cells, electric generators, flexible cables for electric mains constructions), non-electrically powered (e.g. power is created by combustible fuels, triboluminescence) or a naturally occurring source of light (e.g. sunlight).
8 direct subcodes
Child Classifications
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- F21Y 101/00 Point-like light sources
- F21Y 103/00 Elongate light sources, e.g. fluorescent tubes
- F21Y 105/00 Planar light sources
- F21Y 107/00 Light sources with three-dimensionally disposed light-generating elements
- F21Y 109/00 Light sources with light-generating elements disposed on transparent or translucent supports or substrates
- F21Y 111/00 Light sources of a form not covered by groups
- F21Y 113/00 Combination of light sources
- F21Y 115/00 Light-generating elements of semiconductor light sources