Heyl; Lawrence F.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Heyl; Lawrence F..The latest application filed is for "mode switching noise cancellation for microphone-speaker combinations used in two way audio communications".

Company Profile

0.11.6

Heyl; Lawrence F. - Colchester VT US
Heyl; Lawrence F. - Mountain View CA
Heyl, Lawrence F. - Champaign 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
Mode switching noise cancellation for microphone-speaker combinations used in two way audio communications Grant 8,369,534 - Johnson , et al. February 5, 2	2013-02-05
Noise cancellation for microphone-speaker combinations using combined speaker amplifier and reference sensing Grant 8,358,788 - Heyl , et al. January 22, 2	2013-01-22
Differential mode noise cancellation with active real-time control for microphone-speaker combinations used in two way audio communications Grant 8,340,312 - Johnson , et al. December 25, 2	2012-12-25
Mode Switching Noise Cancellation For Microphone-speaker Combinations Used In Two Way Audio Communications App 20120183159 - Johnson; Timothy M. ; et al.	2012-07-19
Mode switching noise cancellation for microphone-speaker combinations used in two way audio communications Grant 8,150,058 - Johnson , et al. April 3, 2	2012-04-03
Noise Cancellation For Microphone-speaker Combinations Using Combined Speaker Amplifier And Reference Sensing App 20110033056 - Johnson; Timothy M. ; et al.	2011-02-10
Mode Switching Noise Cancellation For Microphone-speaker Combinations Used In Two Way Audio Communications App 20110033060 - Johnson; Timothy M. ; et al.	2011-02-10
Differential mode noise cancellation with active real-time control for microphone-speaker combinations used in two way audio communications App 20110033064 - Johnson; Timothy M. ; et al.	2011-02-10
Reduced complexity audio mixing apparatus Grant 7,039,203 - Heyl May 2, 2	2006-05-02
Microphone elements for a computing system App 20030033153 - Olson, Robert N. ; et al.	2003-02-13
Reduced complexity audio mixing apparatus App 20020057809 - Heyl, Lawrence F.	2002-05-16
Audio codec with digital level adjustment and flexible channel assignment Grant 5,774,567 - Heyl June 30, 1	1998-06-30
Apparatus for reproducing sound with a reduced dynamic range Grant 5,613,010 - Heyl , et al. March 18, 1	1997-03-18
Methods and apparatus for connecting and conditioning audio signals Grant 5,517,572 - Heyl May 14, 1	1996-05-14
Pulse width modulation speaker amplifier Grant 5,398,003 - Heyl , et al. March 14, 1	1995-03-14

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