RK

Richard Harry Ketchum

AT AT&T: 7 patents #2,615 of 18,772Top 15%
AT American Telephone And Telegraph: 1 patents #132 of 699Top 20%
📍 Wheaton, IL: #115 of 884 inventorsTop 15%
🗺 Illinois: #10,078 of 84,256 inventorsTop 15%
Overall (All Time): #575,939 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
8640375 1911 handgun disassembly tool and method of making same 2014-02-04
6757384 Robust double-talk detection and recovery in a system for echo cancelation Anand Rangaswamy Setlur 2004-06-29
6744885 ASR talkoff suppressor Anand Rangaswamy Setlur, David Thomson 2004-06-01
6606595 HMM-based echo model for noise cancellation avoiding the problem of false triggers Rathinavelu Chengalvarayan, Anand Rangaswamy Setlur, David Thomson 2003-08-12
5765125 Detection of tones while minimizing incorrect identification of other sounds as tones Jeffrey Daugherty 1998-06-09
5313554 Backward gain adaptation method in code excited linear prediction coders 1994-05-17
4910781 Code excited linear predictive vocoder using virtual searching Willem Bastiaan Kleijn, Daniel J. Krasinski 1990-03-20
4899385 Code excited linear predictive vocoder Willem Bastiaan Kleijn, Daniel J. Krasinski 1990-02-06
4771465 Digital speech sinusoidal vocoder with transmission of only subset of harmonics Edward C. Bronson, Walter T. Hartwell, Thomas E. Jacobs, Willem Baastian Kleijn 1988-09-13