KNOWLES ELECTRONICS, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS 2105

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7065220 Microphone array having a second order directional patternSep 28, 01Jun 20, 06[H04R]
6987859 Raised microstructure of silicon based deviceJul 20, 01Jan 17, 06[H04R]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6130953 HeadsetExpiredJun 09, 98Oct 10, 00[H04R]
5990425 Programmable electrical switchExpiredJan 27, 99Nov 23, 99[H01H]
5178015 Silicon-on-silicon differential input sensorsExpiredJul 22, 91Jan 12, 93[G01L]
5101435 Combined microphone and magnetic induction pickup systemExpiredNov 08, 90Mar 31, 92[H04M, H04R]
4837833 Microphone with frequency pre-emphasis channel plateExpiredJan 21, 88Jun 06, 89[H04R]
4803458 Control switch and potentiometer for hearing aids and the likeExpiredAug 28, 87Feb 07, 89[H01C]
4800982 Cleanable in-the-ear electroacoustic transducerExpiredOct 14, 87Jan 31, 89[H04R]
4730283 Acoustic transducer with improved electrode spacingExpiredSep 15, 86Mar 08, 88[H04R]
4509193 Miniature acoustical transducer with filter/regulator power supply circuitExpiredJul 11, 83Apr 02, 85[H04M]

Top Inventors for This Owner

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