WE

William J. Erwin

AL American Telephone And Telegraph Company, At&T Bell Laboratories: 1 patents #330 of 1,086Top 35%
📍 Gahanna, OH: #149 of 257 inventorsTop 60%
🗺 Ohio: #42,657 of 73,341 inventorsTop 60%
Overall (All Time): #3,894,677 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4896346 Password controlled switching system William R. Belfield, Thomas J. Geers, Jr., Roy V. Grubbe, Stephen W. Handy, Robert J. Perdue 1990-01-23