IPC Subgroup
E03C 1/28 Odour seals
Introduced: September 1968
Last revised: January 2006
Full Title
Domestic plumbing installations for fresh water or waste water; Sinks > Plumbing installations for waste water; Basins or fountains connected thereto; Sinks > Odour seals
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- WATER SUPPLY; SEWERAGE
- Subclass:
- DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
Related Keywords
seals in plumbing installationsSTENCH seals in plumbing installations
5 direct subcodes
Child Classifications
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- E03C 1/282 combined with additional object-catching devices
- E03C 1/284 having U-shaped trap
- E03C 1/29 having housing containing dividing wall, e.g. tubular
- E03C 1/294 with provisions against loss of water lock
- E03C 1/298 consisting only of non-return valve
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