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active element in amplifier being vacuum tube (H03B5/26 takes precedence)

active element in amplifier being vacuum tube (H03B5/26 takes precedence) · Cooperative Patent Classification (CPC)

Electric circuits, power, telecommunications, and semiconductors.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	H03B5/22
Official title	active element in amplifier being vacuum tube (H03B5/26 takes precedence)
Display label	active element in amplifier being vacuum tube (H03B5/26 takes precedence)
Total patents	2

Year-over-year patent counts classified under this CPC code.

Not enough yearly data to assess filing trend yet.

Patents filed per year
Year	Patents
2018	2

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.