197139 ⎘
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general Non-electric sound-amplifying devices, e.g. non-electric megaphones
HEARING AID FOR LEISURE SPORTS
#2Sound Amplification Block Made of Air-Permeable Material and Air-Absorbing Material and Having Layered Structure, and Manufacturing Method Thereof
#3PORTABLE PASSIVE SOUND AMPLIFIER WITH POWER BANK SYSTEM
#4Adjustable and Retractable Headset For Enhanced Hearing Experience
#5Acoustic metamaterial structures and geometry for sound amplification and/or cancellation
#6HATS WITH SOUND DIRECTING ASSEMBLIES
#7Nozzles for amplifying and suppression of sound
#8DETACHABLE, PORTABLE RESONANCE BOX FOR PROVIDING ACOUSTIC STEREO SOUND FROM STRINGED INSTRUMENTS
#9Apparatus for amplifying sound waves
#10Stethoscope acoustic tubing that is disconnectable into separate segments
#11Acoustic meta material passive spiral audio amplifier and a method to make the same
#12Apparatus for collecting sounds in wide area without loss of sounds, and use method therefor
#13Acoustic metamaterial structures and geometry for sound amplification and/or cancellation
#14PASSIVE HEARING AID
#15Music Loudspeaker of Mobile Phone
#16YANG BAMBOO AMPLIFIER AND HOLDER
#17SOUND AMPLIFICATION STETHOSCOPES
#18EARPIECE FOR A MOBILE DEVICE
#19Megaphone having additional lighting or audible features
#20Throat and speaker system
#21Acoustic collection system for handheld electronic devices
#22Acoustic component, acoustic apparatus and acoustic system
#23Speaker case for a mobile device and speaker system with such a speaker case
#24Autoclavable Stethoscope Assembly
#25EARPIECE FOR A MOBILE DEVICE
#26Removable Bottom Cup
#27Earpiece for a mobile device
#28Acoustic collection system for handheld electronic devices
#29Megaphone Device
#30Invention of a Marine Seismic Airgun Pulse Amplifier Cone
#31Acoustic collection system for handheld electronic devices
#32Passive sound proliferation device and methods of using the passive sound proliferation device
#33Sound wave metamaterial
#34Assembly for creating custom structures and coupons from printable blank sheets
#35ACOUSTIC ELECTRONIC DEVICE DOCK
#36ELECTRONIC DEVICE CADDY
#37Acoustic amplification system for a shoe
#38Acoustic collection system for handheld electronic devices
#39Electric stringed instrument amplifier
#40Smart device case with sound speaker
#41SOUND-ENHANCING STORAGE DEVICE
#42Sound amplifying cases for electronic devices
#43Stethoscope head
#44High frequency energy converter
#45PROTECTIVE CASE FOR A MOBILE DEVICE AND SOUND AMPLIFICATION FEATURE THEREOF
#46Self resonance-type sound-producing speaker and method of placing thereof
#47Collapsible megaphone device
#48Sound projection device attachable to a user when not in use
#49SOUND MAXIMIZING AMMELLESCOPE
#50MULTI-FUNCTION CHEERING TOOL
#51Method and apparatus to detect nanometer particles in ultra pure liquids using acoustic microcavitation
#52Megaphone popcorn cup
#53Apparatus to produce acoustic cavitation in a liquid insonification medium
#54Drinking vessel megaphone
#55Sound wave guide structure for speaker system and horn speaker
#56Inflatable megaphone
#57Sound generating arrangement
#58Sound generating apparatus, a mobile electric device and a system for generating sound
#59Apparatus to produce acoustic cavitation in a liquid insonification medium
#60Bullhorn cup
#61Harmonica holder