• 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 9/65 - Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts

Patent holdings for IPC class F21K 9/65

Total number of patents in this class: 280

10-year publication summary

Principal owners for this class