Portable multi-function device

Portable powered speaker

Portable recording system for telephone conversations

Portable telephone attachment for person hard of hearing

Portable telephone with a speaker having an improved acoustic ch

Portable terminal having earphone winding device built therein

Portable waterproof equipment

Ported loudspeaker enclosure

Ported loudspeaker enclosure

Ported loudspeaker system and method

Ported loudspeaker system and method with reduced air turbulence

Ported loudspeaker system and method with reduced air...

Porting

Positioning device for diaphragm for speakers

Power amplifier and loudspeaker frame integration

Pre-formed speaker grille cloth

Pressure gradient microphone

Pressure responsive device and method of manufacturing...

Pressure-gradient microphone capsule

Pulse rate, pressure and heart condition monitoring glasses