IPC Subgroup
E03B 3/2 of elements of special shape
Introduced: September 1968
Last revised: January 2006
Full Title
Methods or installations for obtaining or collecting drinking water or tap water > from underground > Obtaining and confining water by means of wells > Component parts of wells > Well filters > of elements of special shape
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- WATER SUPPLY; SEWERAGE
- Subclass:
- INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
1 direct subcode
Child Classifications
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- E03B 3/22 Selection of specified materials
Top Applicants
Top 10 applicants by patent filingsfor class E03, 2013–2023, worldwide · Source: EPO PATSTAT
- TOTO 2,957
- LIXIL CORPORATION 1,646
- XIAMEN RT PLUMBING TECHNOLOGY COMPANY 925
- NEOPERL DE 870
- GROHE DE 828
- PANASONIC INTELLECTUAL PROPERTY 738
- WUHAN SHENGYU DRAINAGE SYSTEMS COMPANY 727
- GEBERIT INTERNATIONAL CH 613
- KOHLER COMPANY US 570
- TOTO JP 549