DIFF Subgroup
F21S 13/10 with a standard, e.g. street lamp
Introduced: September 1968
Full Title
Non-electric lighting devices or systems employing a point-like light source; Non-electric lighting devices or systems employing a light source of unspecified shape > Devices intended to be fixed, e.g. ceiling lamp, wall lamp > with a standard, e.g. street lamp
No child classifications to compare. This is a leaf node in both IPC and CPC.