DIFF Subgroup
B08B 17/04 by using removable coverings
Introduced: September 1968
Full Title
Methods preventing fouling > Preventing deposition of fouling or of dust > by using removable coverings
No child classifications to compare. This is a leaf node in both IPC and CPC.
Top Applicants
Top Applicants (IPC)
Class B08,2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 1,817
- SCREEN HOLDINGS JP 591
- TOKYO ELECTRON JP 558
- CHONGQING RUNZE PHARMACEUTICAL COMPANY 547
- APPLIED MATERIALS US 506
- CHINESE ACADEMY OF SCIENCES 490
- SEMES COMPANY KR 464
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 411
- ECOLAB US 380
- PETROCHINA COMPANY 369
Top Applicants (CPC)
Class B08,2013–2023, worldwide · Source: EPO PATSTAT
- TOKYO ELECTRON JP 982
- SCREEN HOLDINGS JP 980
- APPLIED MATERIALS US 739
- SGCC(STATE GRID CORPORATION OF CHINA) 721
- SEMES COMPANY KR 691
- ECOLAB US 515
- SCREEN HOLDINGS 510
- TOKYO ELECTRON 505
- PHILIPS ELECTRONICS NL 493
- EBARA CORPORATION JP 475