What is CPC F16J9/16?

CPC F16J9/16 is the Cooperative Patent Classification code for “obtained by stacking of rings.”

How many patents are filed under CPC F16J9/16 (obtained by stacking of rings)?

Our database includes 36 publications tagged with this CPC code.

Publication counts under this code: 6 in 2024 vs 7 in 2025 (latest complete years).

obtained by stacking of rings · 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	F16J9/16
Official title	obtained by stacking of rings
Display label	obtained by stacking of rings
Total patents	36

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

Filing activity over the last five years is rapidly growing.

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 F16J9/16?: CPC F16J9/16 is the Cooperative Patent Classification code for “obtained by stacking of rings.”
How many patents are filed under CPC F16J9/16 (obtained by stacking of rings)?: Our database includes 36 publications tagged with this CPC code.
Is patent activity under CPC F16J9/16 growing?: Publication counts under this code: 6 in 2024 vs 7 in 2025 (latest complete years).