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IPC Subgroup
D01D 5/24

with a hollow structure; Spinnerette packs therefor

Introduced: September 1968

Last revised: January 2006

Full Title

Formation of filaments, threads, or the like > with a hollow structure; Spinnerette packs therefor

Classification Context

Section:
TEXTILES; PAPER
Class:
NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
Subclass:
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS

1 direct subcode

Child Classifications

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  • D01D 5/247 Discontinuous hollow structure or microporous structure

Top Applicants

Top 10 applicants by patent filingsfor class D01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. NATIONAL DONG HWA UNIVERSITY 1,242
  2. MASCHINENFABRIK RIETER CH 1,162
  3. TORAY INDUSTRIES JP 1,093
  4. TORAY INDUSTRIES 802
  5. JIANGNAN UNIVERSITY 771
  6. WUHAN TEXTILE UNIVERSITY 663
  7. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 653
  8. CHINESE ACADEMY OF SCIENCES 559
  9. LENZING AT 525
  10. MURATA MACHINERY 492