Assignee
KNOWLES ELECTRONICS INC
US32 patents
Top patents by PatentIndex Score
US5870482AFeb 9, 1999
Miniature silicon condenser microphone
KNOWLES ELECTRONICS INC408 citations99
US5740261AApr 14, 1998
Miniature silicon condenser microphone
KNOWLES ELECTRONICS INC205 citations99
US5490220AFeb 6, 1996
Solid state condenser and microphone devices
KNOWLES ELECTRONICS INC298 citations99
US5960093ASep 28, 1999
Miniature transducer
KNOWLES ELECTRONICS INC91 citations98
US5068901ANov 26, 1991
Dual outlet passage hearing aid transducer
KNOWLES ELECTRONICS INC57 citations96
US5692060ANov 25, 1997
Unidirectional microphone
KNOWLES ELECTRONICS INC69 citations94
US5861779AJan 19, 1999
Impedance circuit for a miniature hearing aid
KNOWLES ELECTRONICS INC39 citations92
US5446413AAug 29, 1995
Impedance circuit for a miniature hearing aid
KNOWLES ELECTRONICS INC26 citations92
US5193116AMar 9, 1993
Hearing and output transducer with self contained amplifier
KNOWLES ELECTRONICS INC94 citations92
US5101435AMar 31, 1992
Combined microphone and magnetic induction pickup system
KNOWLES ELECTRONICS INC35 citations92
US5083095AJan 21, 1992
Plural source follower amplifier
KNOWLES ELECTRONICS INC40 citations92
US6028502AFeb 22, 2000
Potentiometer detent
KNOWLES ELECTRONICS INC23 citations91
US5337011AAug 9, 1994
Pre-amplifier
KNOWLES ELECTRONICS INC40 citations91
US5335286AAug 2, 1994
Electret assembly
KNOWLES ELECTRONICS INC50 citations91
US5259035ANov 2, 1993
Automatic microphone mixer
KNOWLES ELECTRONICS INC38 citations91
US6041131AMar 21, 2000
Shock resistant electroacoustic transducer
KNOWLES ELECTRONICS INC44 citations89
US6130953AOct 10, 2000
Headset
KNOWLES ELECTRONICS INC81 citations88
US5222050AJun 22, 1993
Water-resistant transducer housing with hydrophobic vent
KNOWLES ELECTRONICS INC92 citations88
US5548658AAug 20, 1996
Acoustic Transducer
KNOWLES ELECTRONICS INC46 citations87
US5408534AApr 18, 1995
Electret microphone assembly, and method of manufacturer
KNOWLES ELECTRONICS INC51 citations86
US6654477B1Nov 25, 2003
Receiver and method of construction
KNOWLES ELECTRONICS INC17 citations84
US7065220B2Jun 20, 2006
Microphone array having a second order directional pattern
KNOWLES ELECTRONICS INC17 citations83
US5990425ANov 23, 1999
Programmable electrical switch
KNOWLES ELECTRONICS INC17 citations82
US6985598B1Jan 10, 2006
Programming system for programming hearing aids
KNOWLES ELECTRONICS INC31 citations81
US5319717AJun 7, 1994
Hearing aid microphone with modified high-frequency response
KNOWLES ELECTRONICS INC24 citations80
USD360949SAug 1, 1995
Hearing aid receiver
KNOWLES ELECTRONICS INC18 citations78
US5559892ASep 24, 1996
Impedence buffering MOS circuit with dynamically reduced threshold voltage, as for use in an output buffer of a hearing aid amplifier
KNOWLES ELECTRONICS INC15 citations73
USD360948SAug 1, 1995
Hearing aid receiver
KNOWLES ELECTRONICS INC14 citations70
USD360691SJul 25, 1995
Hearing aid receiver
KNOWLES ELECTRONICS INC13 citations70
US5353244AOct 4, 1994
Computer controlled transversal equalizer
KNOWLES ELECTRONICS INC10 citations69
USD414493SSep 28, 1999
Microphone housing
KNOWLES ELECTRONICS INC16 citations60
US5297075AMar 22, 1994
Computer controlled transversal equalizer
KNOWLES ELECTRONICS INC3 citations58