IPC Subgroup
G08C 19/12 in which the signal transmitted is frequency or phase of AC
Introduced: September 1968
Last revised: January 2006
Full Title
Electric signal transmission systems > in which the signal transmitted is frequency or phase of AC
Classification Context
- Section:
- PHYSICS
- Class:
- SIGNALLING
- Subclass:
- TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
1 direct subcode
Child Classifications
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- G08C 19/14 using combination of fixed frequencies
Top Applicants
Top 10 applicants by patent filingsfor class G08, 2013–2023, worldwide · Source: EPO PATSTAT
- TOYOTA MOTOR CORPORATION 6,781
- SGCC(STATE GRID CORPORATION OF CHINA) 5,954
- ROBERT BOSCH DE 3,656
- DENSO CORPORATION 3,452
- HONDA MOTOR COMPANY 2,945
- DENSO CORPORATION JP 2,562
- HONEYWELL INTERNATIONAL US 2,517
- TOYOTA MOTOR CORPORATION JP 2,435
- FORD GLOBAL TECHNOLOGIES US 2,239
- PANASONIC INTELLECTUAL PROPERTY 2,119