• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F21K - Non-electric light sources using luminescence; light sources using electrochemiluminescence; light sources using charges of combustible material; light sources using semiconductor devices as light-generating elements; light 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: 262

10-year publication summary

Principal owners for this class