of metal

of metal · Cooperative Patent Classification (CPC)

Building, mining, and civil engineering structures.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeE04D3/30
Official titleof metal
Display labelof metal
Total patents57

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
20165
20175
20186
20199
20203
20217
20225
20238
20246
20253

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 E04D3/30?
CPC E04D3/30 is the Cooperative Patent Classification code for “of metal.”
How many patents are filed under CPC E04D3/30 (of metal)?
Our database includes 57 publications tagged with this CPC code.
Is patent activity under CPC E04D3/30 growing?
Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).