Constructional features of auditoriums

Constructional features of auditoriums · 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 codeE04H3/30
Official titleConstructional features of auditoriums
Display labelConstructional features of auditoriums
Total patents47

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
20168
201711
20183
20196
20205
20216
20221
20234
20242
20251

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 E04H3/30?
CPC E04H3/30 is the Cooperative Patent Classification code for “Constructional features of auditoriums.”
How many patents are filed under CPC E04H3/30 (Constructional features of auditoriums)?
Our database includes 47 publications tagged with this CPC code.
Is patent activity under CPC E04H3/30 growing?
Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).