H03F 1/307 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

H03F 1/307

Full Title

Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements > Modifications of amplifiers to reduce influence of variations of temperature or supply voltage

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.

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