WH

Walter T. Hartwell

AT AT&T: 1 patents #10,626 of 18,772Top 60%
📍 McLeansboro, IL: #80 of 612 inventorsTop 15%
🗺 Illinois: #15,122 of 84,256 inventorsTop 20%
Overall (All Time): #893,814 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
4914692 Automatic speech recognition using echo cancellation Mark A. Johnson, Joseph Picone 1990-04-03
4912764 Digital speech coder with different excitation types Joseph Picone, Dimitrios P. Prezas 1990-03-27
4797926 Digital speech vocoder Edward C. Bronson, Willem Baastian Kleijn, Dimitrios P. Prezas 1989-01-10
4771465 Digital speech sinusoidal vocoder with transmission of only subset of harmonics Edward C. Bronson, Thomas E. Jacobs, Richard Harry Ketchum, Willem Baastian Kleijn 1988-09-13
4719923 Non-invasive blood flow measurements utilizing autoregressive analysis with averaged reflection coefficients Gustavus H. Zimmerman, III 1988-01-19
4221933 Data storage and retrieval structure for a message storage system Ronald G. Cornell, Bently A. Crane, John G. Williams 1980-09-09