CPC Subgroup Additional Only
H01J 2217/38 Cold-cathode tubes
Full Title
Gas-filled discharge tubes > Cold-cathode tubes
2 direct subcodes
Child Classifications
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- H01J 2217/40 Gas discharge switches
- H01J 2217/49 Display panels, e.g. not making use of alternating current (H01J2211/10 takes precedence)