Carlson; Elmer V

Patent Applications and Registrations

Patent applications and USPTO patent grants for Carlson; Elmer V.The latest application filed is for "microphone for hearing aid and communications applications having switchable polar and frequency response characteristics".

Company Profile

0.16.2

Carlson; Elmer V - Glenview IL
Carlson, Elmer V. - Glenview IL
Carlson; Elmer V. - Prospect Heights IL

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics Grant 7,245,728 - Killion , et al. July 17, 2	2007-07-17
Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics App 20050169490 - Killion, Mead C. ; et al.	2005-08-04
Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics Grant 6,876,749 - Killion , et al. April 5, 2	2005-04-05
Transmission detection and switch system for hearing improvement applications Grant 6,694,034 - Julstrom , et al. February 17, 2	2004-02-17
Receiver and method of construction Grant 6,654,477 - Miller , et al. November 25, 2	2003-11-25
Transmission detection and switch system for hearing improvement applications App 20030044033 - Julstrom, Stephen D. ; et al.	2003-03-06
Electret assembly Grant 5,335,286 - Carlson , et al. August 2, 1	1994-08-02
Combined microphone and magnetic induction pickup system Grant 5,101,435 - Carlson March 31, 1	1992-03-31
Dual outlet passage hearing aid transducer Grant 5,068,901 - Carlson November 26, 1	1991-11-26
Acoustic transducer with improved electrode spacing Grant RE33,718 - Carlson , et al. October 15, 1	1991-10-15
Magnetically shielded electromagnetic acoustic transducer Grant 4,956,868 - Carlson September 11, 1	1990-09-11
Passive ear protector Grant 4,807,612 - Carlson February 28, 1	1989-02-28
Cleanable in-the-ear electroacoustic transducer Grant 4,800,982 - Carlson January 31, 1	1989-01-31
Acoustic transducer with improved electrode spacing Grant 4,730,283 - Carlson , et al. March 8, 1	1988-03-08
Acoustic transducer of improved construction Grant 4,272,654 - Carlson June 9, 1	1981-06-09
Acoustic transducer with improved electret assembly Grant 4,063,050 - Carlson , et al. December 13, 1	1977-12-13
Transducer with improved armature and yoke construction Grant 3,935,398 - Carlson , et al. January 27, 1	1976-01-27
Damping element Grant 3,930,560 - Carlson , et al. January 6, 1	1976-01-06

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