CPC Subgroup
G01R 31/24 Testing of discharge tubes (during manufacture H01J9/42)
Full Title
Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere ( testing line transmission systems H04B3/46; testing or measuring semiconductors or solid state devices during manufacture ) > Testing of discharge tubes (during manufacture H01J9/42)
2 direct subcodes
Child Classifications
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- G01R 31/25 Testing of vacuum tubes