CPC Subgroup
D21F 7/005 Full Title
Other details of machines for making continuous webs of paper
Filing statistics
CPC D21F 7/005 belongs to the parent subclass D21F, which recorded 14,174 patent applications worldwide between 2013 and 2023. Annual filings grew from 937 in 2013 to 950 in 2023 (+1%), peaking at 1,654 applications in 2017. The most active applicants in class D21 are VOITH PATENT (1,857 applications), STORA ENSO (1,552 applications) and KEMIRA (1,173 applications).
Source: EPO PATSTAT, worldwide filings
Top Applicants
Top 10 applicants by patent filingsfor class D21, 2013–2023, worldwide · Source: EPO PATSTAT
- VOITH PATENT DE 1,857
- STORA ENSO FI 1,552
- KEMIRA FI 1,173
- KIMBERLY-CLARK CORPORATION US 1,107
- VALMET TECHNOLOGIES FI 965
- VALMET SE 943
- P&G (PROCTER & GAMBLE COMPANY) US 941
- OMYA INTERNATIONAL CH 821
- UPM-KYMMENE CORPORATION FI 512
- SEIKO EPSON CORPORATION JP 501