with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08)

Full Title

Formation of filaments, threads, or the like > with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08)

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

TORAY INDUSTRIES JP 1,268
MASCHINENFABRIK RIETER CH 1,200
NATIONAL DONG HWA UNIVERSITY 955
LENZING AT 602
P&G (PROCTER & GAMBLE COMPANY) US 594
WUHAN TEXTILE UNIVERSITY 494
TRUETZSCHLER & COMPANY DE 453
KOLON INDUSTRIES KR 433
OERLIKON TEXTILE & COMPANY DE 430
CHINESE ACADEMY OF SCIENCES 412