DIFF Subgroup
H03C 3/30 by means of transit-time tube
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Angle modulation > by means of transit-time tube
CPC:
Angle modulation (H03C5/00, H03C7/00 take precedence) > by means of transit-time tube
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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