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Spiral stairways supported by a central column

Spiral stairways supported by a central column · 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 codeE04F11/032
Official titleSpiral stairways supported by a central column
Display labelSpiral stairways supported by a central column
Total patents2

Filing trend

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

Filing activity appears stable based on the most recent years.

Patents filed per year
YearPatents
20221
20231

Representative patents

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