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Roofing elements with cavities, e.g. hollow tiles (E04D1/28 takes precedence)

Roofing elements with cavities, e.g. hollow tiles (E04D1/28 takes precedence) · Cooperative Patent Classification (CPC)

Building, mining, and civil engineering structures.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	E04D1/24
Official title	Roofing elements with cavities, e.g. hollow tiles (E04D1/28 takes precedence)
Display label	Roofing elements with cavities, e.g. hollow tiles (E04D1/28 takes precedence)
Total patents	10

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

Filing activity appears to be declining based on the most recent years.

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