Johnston; Renee

Patent Applications and Registrations

Patent applications and USPTO patent grants for Johnston; Renee.The latest application filed is for "system for conditioning echo response of loop start trunk line".

Company Profile

0.7.6

Johnston; Renee - Dunrobin N/A CA
Johnston; Renee - Ottawa CA

*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
System for conditioning echo response of loop start trunk line Grant 8,654,967 - Schulz , et al. February 18, 2	2014-02-18
Narrow band tone detection in echo canceling system Grant 7,792,280 - Johnston , et al. September 7, 2	2010-09-07
Method of adaptation step control in echo cancellers Grant 7,724,893 - Johnston May 25, 2	2010-05-25
Method of measuring distortion and determining residue-echo threshold in loop start trunk circuits Grant 7,693,276 - Fang , et al. April 6, 2	2010-04-06
Method for detecting echo path changes in echo cancellers Grant 7,508,931 - Johnston , et al. March 24, 2	2009-03-24
System For Conditioning Echo Response Of Loop Start Trunk Line App 20070133786 - Schulz; Dieter ; et al.	2007-06-14
Noise level calculator for echo canceller Grant 7,146,003 - Schulz , et al. December 5, 2	2006-12-05
Method of measuring distortion and determining residue-echo threshold in loop start trunk circuits App 20060198329 - Fang; Yonghua ; et al.	2006-09-07
Method of adaptation step control in echo cancellers App 20060029214 - Johnston; Renee	2006-02-09
Narrow band tone detection in echo canceling system App 20050169458 - Johnston, Renee ; et al.	2005-08-04
Method for detecting echo path changes in echo cancellers App 20050169457 - Johnston, Renee ; et al.	2005-08-04
Noise level calculator for echo canceller App 20020039415 - Schulz, Dieter ; et al.	2002-04-04

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