Patents-Review.com
ClassID:

223404 ⎘

H04B1/46 - CPC Classification

Classification description:

Details of transmission systems, not covered by a single one of groups - ; Details of transmission systems not characterised by the medium used for transmission; Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving; Circuits; Transmit/receive switching by voice-frequency signals; by pilot signals

Recent Application in this class:
#1
20240340527
2024-10-10

ELECTRONIC APPARATUS AND COMMUNICATION APPARATUS

 #2
20180294835
2018-10-11

Radio communication device

 #3
20160112559
2016-04-21

Mobile terminal apparatus

 #4
20160021472
2016-01-21

Modular voice amplification system for protective mask

 #5
20150296351
2015-10-15

Method for automatically switching to a channel for transmission on a multi-watch portable radio

 #6
20150244406
2015-08-27

Method and apparatus for overriding a PTT switch to activate a microphone

 #7
20140248926
2014-09-04

Mobile terminal apparatus

 #8
20130218575
2013-08-22

Communication apparatus and condition notification method for notifying a used condition of communication apparatus by using a light-emitting device attached to communication apparatus

 #9
20120224709
2012-09-06

VOICE ACTIVATION SYSTEM AND METHOD AND COMMUNICATION SYSTEM AND METHOD USING THE SAME

 #10
20120196640
2012-08-02

System, voice cable assembly, and method for voice communication

 #11
20110319128
2011-12-29

Mobile terminal apparatus

 #12
20110211620
2011-09-01

Switching between transmit and receive modes in a wireless transceiver

 #13
20110110277
2011-05-12

Multiple device to one-antenna combining circuit and methods of using same

 #14
20100151921
2010-06-17

Radio communication device

 #15
20100081398
2010-04-01

Audio signal processing circuit

 #16
20090233561
2009-09-17

Portable terminal apparatus, its control method, and program

 #17
20090129606
2009-05-21

VOX circuit with 2-wire interfaces

 #18
20090098836
2009-04-16

Method and apparatus to provide digital signaling without internal modification of analog FM transceiver

 #19
20090017879
2009-01-15

System and method for reducing power consumption in a wireless device

 #20
20080112467
2008-05-15

Systems and methods for detecting the presence of a transmission signal in a wireless channel

 #21
20070264951
2007-11-15

Automatically calibrating frequency features of a phase locked loop

 #22
20060256713
2006-11-16

System and method for achieving voice-activated radio broadcasting over IP networks

 #23
20060211394
2006-09-21

Communication link termination indication signal method and apparatus

 #24
20050245203
2005-11-03

Device and method for hands-free push-to-talk functionality

 #25
20050233706
2005-10-20

Switching circuit