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Class Information
Number: 340/384.6
Name: Communications: electrical > Audible indication > Piezoelectric
Description: Subject matter wherein the audible signalling means is provided with a vibrator device for converting energized electrical signals into audible sounds in such a manner that the operation of the device depends on the interaction between electric charge of the energized electrical signals and the deformation or mechanical stress property of a crystal or ceramic element incorporated into the device.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7605686 |
Alerting system for a communication device |
Oct. 20, 2009 |
| 7551061 |
Sound generator: a piezoelectric buzzer on a flexible, tensioned surface of an inflatable object |
Jun. 23, 2009 |
| 7536020 |
Wearable communication device |
May. 19, 2009 |
| 7474208 |
Method and system for locating an object |
Jan. 6, 2009 |
| 7439872 |
Method and mobile device for non-visually signaling the state of a mobile device |
Oct. 21, 2008 |
| 7385482 |
Electro-optical device and electronic apparatus |
Jun. 10, 2008 |
| 7334735 |
Card for interaction with a computer |
Feb. 26, 2008 |
| 7201996 |
Sound generator for a portable device |
Apr. 10, 2007 |
| 7148789 |
Handheld device having multiple localized force feedback |
Dec. 12, 2006 |
| 7130664 |
User-based signal indicator for telecommunications device and method of remotely notifying a user of an incoming communications signal incorporating the same |
Oct. 31, 2006 |
| 7106180 |
Directional acoustic alerting system |
Sep. 12, 2006 |
| 7098778 |
Impact sensor assembly and method of attaching same to a vehicle |
Aug. 29, 2006 |
| 7095313 |
Meter apparatus for vehicles |
Aug. 22, 2006 |
| 7071816 |
Audible alert device and method for the manufacture and programming of the same |
Jul. 4, 2006 |
| 7049959 |
Powerless type security device |
May. 23, 2006 |
| 7019621 |
Methods and apparatus to increase sound quality of piezoelectric devices |
Mar. 28, 2006 |
| 6995659 |
Sound generating transducer |
Feb. 7, 2006 |
| 6987445 |
Water resistant audible signal |
Jan. 17, 2006 |
| 6788188 |
Multi-function electronic horn warning system |
Sep. 7, 2004 |
| 6756883 |
Extra loud low frequency acoustical alarm assembly |
Jun. 29, 2004 |
| 6686833 |
Compound acoustic actuator drive circuit and portable information terminal |
Feb. 3, 2004 |
| 6617967 |
Piezoelectric siren driver circuit |
Sep. 9, 2003 |
| 6617966 |
Compound acoustic actuator drive circuit and portable information terminal |
Sep. 9, 2003 |
| 6559758 |
Multi-tone warning sounder |
May. 6, 2003 |
| 6512450 |
Extra loud low frequency acoustical alarm assembly |
Jan. 28, 2003 |
| 6414604 |
Piezoelectric transducer assembly adapted for enhanced functionality |
Jul. 2, 2002 |
| 6339368 |
Circuit for automatically driving mechanical device at its resonance frequency |
Jan. 15, 2002 |
| 6310540 |
Multiple signal audible oscillation generator |
Oct. 30, 2001 |
| 6280650 |
Piezoelectric ceramic composition, buzzer and actuator using the same |
Aug. 28, 2001 |
| 6262654 |
Audible alarm-wire identifier |
Jul. 17, 2001 |
| 6236309 |
Horn switch assembly for an airbag module |
May. 22, 2001 |
| 6172607 |
Portable theft alarm |
Jan. 9, 2001 |
| 6166623 |
Modular alarm assembly |
Dec. 26, 2000 |
| 6166624 |
Piezoelectric horn, particularly for vehicles |
Dec. 26, 2000 |
| 6150923 |
Alarm system |
Nov. 21, 2000 |
| 6147595 |
Structure of buzzer |
Nov. 14, 2000 |
| 6137415 |
Audio signal for spring-loaded rodent traps |
Oct. 24, 2000 |
| 6130618 |
Piezoelectric transducer assembly adapted for enhanced functionality |
Oct. 10, 2000 |
| 6020819 |
Radio wave receiving signaling device |
Feb. 1, 2000 |
| 5990784 |
Schmitt trigger loud alarm with feedback |
Nov. 23, 1999 |
| 5905326 |
Piezoelectric buzzer control circuit |
May. 18, 1999 |
| 5905429 |
Audio label |
May. 18, 1999 |
| 5872506 |
Piezoelectric transducer having directly mounted electrical components and noise making device utilizing same |
Feb. 16, 1999 |
| 5842288 |
Clothes dryer with chiming alarm |
Dec. 1, 1998 |
| 5831515 |
Electronic siren apparatus including an integrated handheld microphone and control handle |
Nov. 3, 1998 |
| 5793282 |
Piezoelectric audio chime |
Aug. 11, 1998 |
| 5748082 |
Light sensitive switch for alerting devices |
May. 5, 1998 |
| 5745028 |
Directional motion instrumentation system |
Apr. 28, 1998 |
| 5670932 |
Piezoelectric sounder |
Sep. 23, 1997 |
| 5638043 |
Warning apparatus |
Jun. 10, 1997 |
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