IPC Subgroup
H05B 39/04 Controlling
Introduced: September 1968
Last revised: January 2006
Full Title
Circuit arrangements or apparatus for operating incandescent light sources > Controlling
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- Subclass:
- ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
2 direct subcodes
Child Classifications
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- H05B 39/06 Switching arrangements, e.g. from series operation to parallel operation
- H05B 39/08 by shifting phase of trigger voltage applied to gas-filled controlling tubes
Top Applicants
Top 10 applicants by patent filingsfor class H05, 2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG ELECTRONICS COMPANY KR 7,201
- PANASONIC INTELLECTUAL PROPERTY 6,828
- SEMICONDUCTOR ENERGY LABORATORY COMPANY 3,988
- LG ELECTRONICS KR 3,564
- PANASONIC INTELLECTUAL PROPERTY JP 3,533
- SAMSUNG DISPLAY KR 3,310
- FUJI JP 2,870
- SAMSUNG ELECTRO-MECHANICS COMPANY KR 2,675
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 2,665
- MURATA MANUFACTURING COMPANY JP 2,634