Fastening of component parts of lighting devices: with keying means, i.e. for

Official title: {with keying means, i.e. for enabling the assembling of component parts in distinctive positions, e.g. for preventing wrong mounting}

F21V17/005 (Fastening of component parts of lighting devices: with keying means, i.e. for) appears on 222 US grants and 256 published applications in this corpus.