DIFF Subgroup
H01H 33/668 Means for obtaining or monitoring the vacuum
Introduced: January 2000
Full Title
High-tension or heavy-current switches with arc-extinguishing or arc-preventing means > Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid > Vacuum switches > Means for obtaining or monitoring the vacuum
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.
Child Classifications
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