Assignee
WHEELOCK INC
US40 patents
Top patents by PatentIndex Score
US5751210AMay 12, 1998
Synchronized video/audio alarm system
WHEELOCK INC59 citations96
US5608375AMar 4, 1997
Synchronized visual/audible alarm system
WHEELOCK INC85 citations96
US6462665B1Oct 8, 2002
Method and apparatus for sending a weather condition alert
WHEELOCK INC182 citations95
US5982275ANov 9, 1999
Synchronized video/audio alarm system
WHEELOCK INC31 citations95
US5684467ANov 4, 1997
Universal mounting plate for audible-visual alarms
WHEELOCK INC58 citations95
US5400009AMar 21, 1995
Synchronization circuit for visual/audio alarms
WHEELOCK INC48 citations95
USRE38183EJul 15, 2003
Synchronization circuit for visual/audio alarms
WHEELOCK INC38 citations92
US6583718B2Jun 24, 2003
Apparatus and method for synchronizing visual/audible alarm units in an alarm system
WHEELOCK INC13 citations92
US6411201B1Jun 25, 2002
Strobe alarm with strobe intensity selector switch
WHEELOCK INC32 citations92
US6369696B2Apr 9, 2002
Apparatus and method for synchronizing visual/audible alarm units in an alarm system
WHEELOCK INC20 citations92
US6311021B1Oct 30, 2001
Multi-candela alarm unit
WHEELOCK INC45 citations92
US6271763B1Aug 7, 2001
Audible and audible-visible alarms with interchangeable cover
WHEELOCK INC32 citations92
US6194994B1Feb 27, 2001
Apparatus and method for synchronizing visual/audible alarm units in an alarm system
WHEELOCK INC22 citations92
US5969627AOct 19, 1999
Audible and audible-visible alarms with interchangeable cover
WHEELOCK INC41 citations92
US5805071ASep 8, 1998
Universal mounting plate for audible-visual alarms
WHEELOCK INC38 citations92
US5673030ASep 30, 1997
Zero inrush alarm circuit
WHEELOCK INC20 citations92
US5341069AAug 23, 1994
Microprocessor-controlled strobe light
WHEELOCK INC36 citations92
US5121033AJun 9, 1992
Strobe circuit utilizing optocoupler in DC-to-DC converter
WHEELOCK INC41 citations92
US7663500B2Feb 16, 2010
Method and apparatus for providing a notification appliance with a light emitting diode
WHEELOCK INC12 citations91
US4967177AOct 30, 1990
Audiovisual signaling device and method
WHEELOCK INC31 citations90
US5128591AJul 7, 1992
Strobe alarm circuit
WHEELOCK INC40 citations87
US5293155AMar 8, 1994
Interface for a supervised multi-input audible warning system
WHEELOCK INC26 citations86
US7403096B2Jul 22, 2008
Apparatus and method for synchronizing visual/audible alarm units in an alarm system
WHEELOCK INC9 citations84
USD315112SMar 5, 1991
Alarm signal cover
WHEELOCK INC20 citations80
US7079011B2Jul 18, 2006
Apparatus and method for synchronizing visual/audible alarm units in an alarm system
WHEELOCK INC4 citations74
US6906616B1Jun 14, 2005
Apparatus and method for synchronizing visual/audible alarm units in an alarm system
WHEELOCK INC11 citations74
USD374635SOct 15, 1996
Cover for an audible-visual alarm
WHEELOCK INC14 citations73
US5475361ADec 12, 1995
Strobe warning light
WHEELOCK INC19 citations71
US5213411AMay 25, 1993
Strobe light
WHEELOCK INC7 citations70
US7428311B2Sep 23, 2008
Method and apparatus for boosting an audible signal in a notification system
WHEELOCK INC6 citations69
US6217196B1Apr 17, 2001
Strobe light system
WHEELOCK INC14 citations67
US5347259ASep 13, 1994
Strobe warning light
WHEELOCK INC18 citations67
US7907047B2Mar 15, 2011
Apparatus and method for synchronizing visual/audible alarm units in an alarm system
WHEELOCK INC2 citations63
US5446349AAug 29, 1995
Strobe circuit utilizing optocoupler in DC-to-DC converter
WHEELOCK INC8 citations63
USRE35837EJul 7, 1998
Microprocessor-controlled strobe light
WHEELOCK INC3 citations62
US8026828B2Sep 27, 2011
Method and apparatus for providing a notification appliance with a light emitting diode
WHEELOCK INC3 citations61
US8026829B2Sep 27, 2011
Method and apparatus for providing a notification appliance with a light emitting diode
WHEELOCK INC3 citations61
US7830252B2Nov 9, 2010
Method and apparatus for providing an ASIC controlled alarm unit
WHEELOCK INC3 citations59
US4970490ANov 13, 1990
Motor bell alarm
WHEELOCK INC2 citations59
US5432294AJul 11, 1995
Electronic bell tone generator
WHEELOCK INC6 citations54