Using LED lighting technology and sensors as currently used in the seat cushions Skoda has filed a Patent for illuminated seat belt buckles which would be a world first. The idea is that when a person sits on the seat the buckle will glow red from the normal unseated white colour. When the buckle is fastened it changes to green and then back to white so it doesn't distract the driver.

It would seem unlikely that Skoda could patent such a basic system as this.

 

In effect a coupling that indicates green when fastened and red when unfastened. Like every ISOfix baby seat for the last 10yr.

 

I've not honestly ever heard of anyone who has said,  "I am unable to tell if I have fastened my seatbelt properly".

 

Plenty find it hard to do or can't be bothered but needing a light to tell you it's in properly? A light you can't see without looking in a very awkward place?