• All sections
• F - Mechanical engineeringlightingheatingweaponsblasting
• F21K - Non-electric light sources using luminescencelight sources using electrochemiluminescencelight sources using charges of combustible materiallight sources using semiconductor devices as light-generating elementslight sources not otherwise provided for
• F21K 9/23 - Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings

Patent holdings for IPC class F21K 9/23

Total number of patents in this class: 481

10-year publication summary

Principal owners for this class