DIFF Subgroup
F21K 2/04 using triboluminescence; using thermoluminescence
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Non-electric light sources using luminescence; Light sources using electrochemiluminescence > using triboluminescence; using thermoluminescence
CPC:
Non-electric light sources using luminescence (using excitation by radioactivity G21H3/02, H01J65/06, H01J65/08; using excitation by an external electromagnetic field or by external corpuscular radiation H01J65/04); Light sources using electrochemiluminescence > using triboluminescence; using thermoluminescence
No child classifications to compare. This is a leaf node in both IPC and CPC.