DH

Donald R. Hammer

TT The Southwestern Bell Telephone: 1 patents #14 of 41Top 35%
📍 Waterloo, IL: #19 of 45 inventorsTop 45%
🗺 Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #3,981,157 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4690491 Building data transmission system David E. Stein 1987-09-01