• All sections
• F - Mechanical engineeringlightingheatingweaponsblasting
• F21S - Non-portable lighting devicessystems thereofvehicle lighting devices specially adapted for vehicle exteriors
• F21S 41/64 - Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices

Patent holdings for IPC class F21S 41/64

Total number of patents in this class: 228

10-year publication summary

Principal owners for this class