the supplementary medium flowing in series through the units

the supplementary medium flowing in series through the units · Cooperative Patent Classification (CPC)

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

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeF28D7/0091
Official title{the supplementary medium flowing in series through the units}
Display labelthe supplementary medium flowing in series through the units
Total patents58

Filing trend

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

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
20151
20169
20178
20183
201910
20205
20215
20227
20233
20245
20252

Representative patents

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

Frequently asked questions

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

What is CPC F28D7/0091?
CPC F28D7/0091 is the Cooperative Patent Classification code for “the supplementary medium flowing in series through the units.”
How many patents are filed under CPC F28D7/0091 (the supplementary medium flowing in series through the units)?
Our database includes 58 publications tagged with this CPC code.
Is patent activity under CPC F28D7/0091 growing?
Publication counts under this code: 5 in 2024 vs 2 in 2025 (latest complete years).