H03H9/644 - CPC Classification Index

ClassID:

220809 ⎘

H03H9/644 - CPC Classification

Classification description:

Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators; Filters using surface acoustic waves; Means for obtaining a particular transfer characteristic; Coupled resonator filters having two acoustic tracks

Sub-classes:

H03H9/6443 » {being acoustically coupled} 5
H03H9/6456 » {being electrically coupled} 11

Recent Application in this class:

20170126203

2017-05-04

Surface acoustic wave filters with substrate thickness selected from plural non-contiguous thickness ranges

20170077901

2017-03-16

Surface acoustic wave filter devices

20150084716

2015-03-26

Duplexer

20120235769

2012-09-20

Elastic wave filter

20120182088

2012-07-19

Duplexer

20120001727

2012-01-05

Saw filter and a receiver for remote keyless entry and tire pressure monitoring systems using same

20110193654

2011-08-11

Elastic wave filter device and module including the same

20100066461

2010-03-18

Duplexer and elastic wave device