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with provision for narrowing or widening; with reciprocatory action, e.g. for knitting of flat portions

with provision for narrowing or widening; with reciprocatory action, e.g. for knitting of flat portions · Cooperative Patent Classification (CPC)

Textile and paper production, treatment, and products.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	D04B9/20
Official title	with provision for narrowing or widening; with reciprocatory action, e.g. for knitting of flat portions
Display label	with provision for narrowing or widening; with reciprocatory action, e.g. for knitting of flat portions
Total patents	6

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

Filing activity appears stable based on the most recent years.

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