DC

Duane H. Cooper

ND National Research Development: 1 patents #307 of 1,071Top 30%
📍 Champaign, IL: #167 of 1,105 inventorsTop 20%
🗺 Illinois: #13,022 of 84,256 inventorsTop 20%
Overall (All Time): #766,659 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
5333200 Head diffraction compensated stereo system with loud speaker array Jerald L. Bauck 1994-07-26
5136651 Head diffraction compensated stereo system Jerald L. Bauck 1992-08-04
5034983 Head diffraction compensated stereo system Jerald L. Bauck 1991-07-23
4975954 Head diffraction compensated stereo system with optimal equalization Jerald L. Bauck 1990-12-04
4910779 Head diffraction compensated stereo system with optimal equalization Jerald L. Bauck 1990-03-20
4893342 Head diffraction compensated stereo system Jerald L. Bauck 1990-01-09
4236039 Signal matrixing for directional reproduction of sound 1980-11-25