DIFF Subgroup
H03F 3/193 with field-effect devices (H03F3/195 takes precedence)
Introduced: July 1974
Title
Titles differ between systems:
IPC: with field-effect devices
CPC: with field-effect devices (H03F3/195 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > High-frequency amplifiers, e.g. radio frequency amplifiers > with semiconductor devices only > with field-effect devices
CPC:
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > High-frequency amplifiers, e.g. radio frequency amplifiers > with semiconductor devices only > with field-effect devices (H03F3/195 takes precedence)
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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