Inventor
CARLSON ELMER V
US20 patents
⚠️ This page may combine multiple inventors who share the name “CARLSON ELMER V”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
INDUSTRIAL RESEARCH PROD INC
11 patentsUS4800982AJan 31, 1989
Cleanable in-the-ear electroacoustic transducer
INDUSTRIAL RESEARCH PROD INC149 citations98
US4956868ASep 11, 1990
Magnetically shielded electromagnetic acoustic transducer
INDUSTRIAL RESEARCH PROD INC59 citations96
US4867267ASep 19, 1989
Hearing aid transducer
INDUSTRIAL RESEARCH PROD INC59 citations96
US4272654AJun 9, 1981
Acoustic transducer of improved construction
INDUSTRIAL RESEARCH PROD INC102 citations96
US4063050ADec 13, 1977
Acoustic transducer with improved electret assembly
INDUSTRIAL RESEARCH PROD INC50 citations96
US3930560AJan 6, 1976
Damping element
INDUSTRIAL RESEARCH PROD INC57 citations93
US4807612AFeb 28, 1989
Passive ear protector
INDUSTRIAL RESEARCH PROD INC39 citations92
US4730283AMar 8, 1988
Acoustic transducer with improved electrode spacing
INDUSTRIAL RESEARCH PROD INC31 citations92
US4509193AApr 2, 1985
Miniature acoustical transducer with filter/regulator power supply circuit
INDUSTRIAL RESEARCH PROD INC28 citations92
US4006321AFeb 1, 1977
Transducer coupling system
INDUSTRIAL RESEARCH PROD INC36 citations92
US3935398AJan 27, 1976
Transducer with improved armature and yoke construction
INDUSTRIAL RESEARCH PROD INC96 citations91
KNOWLES ELECTRONICS INC
4 patentsUS5068901ANov 26, 1991
Dual outlet passage hearing aid transducer
KNOWLES ELECTRONICS INC57 citations96
US5101435AMar 31, 1992
Combined microphone and magnetic induction pickup system
KNOWLES ELECTRONICS INC35 citations92
US5335286AAug 2, 1994
Electret assembly
KNOWLES ELECTRONICS INC50 citations91
US6654477B1Nov 25, 2003
Receiver and method of construction
KNOWLES ELECTRONICS INC17 citations84
ETYMOTIC RES INC
3 patentsUS6694034B2Feb 17, 2004
Transmission detection and switch system for hearing improvement applications
ETYMOTIC RES INC194 citations98
US6876749B1Apr 5, 2005
Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics
ETYMOTIC RES INC28 citations92
US7245728B2Jul 17, 2007
Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics
ETYMOTIC RES INC8 citations74