What is CPC F16K5/20?

CPC F16K5/20 is the Cooperative Patent Classification code for “for plugs with spherical surfaces.”

How many patents are filed under CPC F16K5/20 (for plugs with spherical surfaces)?

Our database includes 60 publications tagged with this CPC code.

Publication counts under this code: 9 in 2024 vs 2 in 2025 (latest complete years).

for plugs with spherical surfaces · Cooperative Patent Classification (CPC)

Engines, pumps, lighting, heating, and mechanical systems.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	F16K5/20
Official title	for plugs with spherical surfaces
Display label	for plugs with spherical surfaces
Total patents	60

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

Filing activity over the last five years is declining.

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

Answers are generated from the same data shown on this page.

What is CPC F16K5/20?: CPC F16K5/20 is the Cooperative Patent Classification code for “for plugs with spherical surfaces.”
How many patents are filed under CPC F16K5/20 (for plugs with spherical surfaces)?: Our database includes 60 publications tagged with this CPC code.
Is patent activity under CPC F16K5/20 growing?: Publication counts under this code: 9 in 2024 vs 2 in 2025 (latest complete years).