227532 ⎘
Substation equipment, e.g. for use by subscribers Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal
EARPHONE WITHOUT COVERING AN EAR CANAL
#2ACOUSTIC OUTPUT APPARATUS
#3ACOUSTIC OUTPUT APPARATUS AND METHODS THEREOF
#4ACOUSTIC OUTPUT APPARATUS
#5OPEN EARPHONE
#6ACOUSTIC OUTPUT APPARATUS
#7ACOUSTIC OUTPUT DEVICE
#8ACOUSTIC OUTPUT DEVICE AND COMPONENTS THEREOF
#9Acoustic device
#10ACOUSTIC OUTPUT DEVICE AND NOISE REDUCTION AND SOUND TRANSMISSION DEVICE
#11Acoustic output apparatus
#12ACOUSTIC OUTPUT APPARATUS AND METHOD THEREOF
#13Earphone without covering an ear canal
#14Acoustic output apparatus
#15Acoustic output apparatus
#16Acoustic output apparatus and methods thereof
#17Open earphone
#18Acoustic output device
#19Acoustic output device
#20Acoustic output device
#21Acoustic output device
#22Acoustic device
#23ACOUSTIC OUTPUT APPARATUS AND METHOD THEREOF
#24Acoustic output device
#25Acoustic output device and components thereof
#26Acoustic output apparatus
#27Acoustic output apparatus
#28Acoustic output apparatus
#29Open earphone
#30Acoustic output device and noise reduction and sound transmission device
#31Acoustic output apparatus
#32Acoustic output apparatus and methods thereof
#33Acoustic output apparatus and method thereof
#34Acoustic output apparatus
#35Acoustic output apparatus
#36Acoustic output device and buttons thereof
#37Acoustic output apparatus
#38Earphone without covering an ear canal
#39Microphone noise reduction system and smart glasses using the system
#40Acoustic output device and components thereof
#41Acoustic output apparatus
#42Audio glasses
#43Acoustic output device
#44Acoustic output apparatus with a plurality of acoustic drivers and methods thereof
#45Acoustic output apparatus
#46Acoustic output apparatus with drivers in multiple frequency ranges and bluetooth low energy receiver
#47Acoustic output apparatus
#48Open earphone
#49Acoustic output apparatus and methods thereof
#50Open earphone
#51Acoustic device
#52Acoustic output device
#53Acoustic output apparatus
#54Open earphone
#55Electronic device for authenticating user by using audio signal and method thereof
#56Switch control circuit, semiconductor device, and radio communication device
#57Switch control circuit, semiconductor device, and radio communication device
#58Termination circuit for broadband signal lines
#59Method of transmitting DSL data over 2 POTS loops