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for double roof covering or overroofing

for double roof covering or overroofing · 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	E04D3/3608
Official title	{for double roof covering or overroofing}
Display label	for double roof covering or overroofing
Total patents	5

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.