H04Q9/12 - CPC Classification Index

ClassID:

231312 ⎘

H04Q9/12 - CPC Classification

Classification description:

Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom; Calling by using continuous ac using combinations of frequencies

Recent Application in this class:

20190154479

2019-05-23

ESTIMATING FLOW VELOCITY IN PIPES BY CORRELATING MULTI-FREQUENCY SIGNALS

20170102479

2017-04-13

Whole-space inversion using phase correction method for multi-frequency dielectric array logging tool

20140176066

2014-06-26

Communication and charging circuitry for a single-coil implantable medical device

20130103115

2013-04-25

Communication and charging circuitry for a single-coil implantable medical device