DD

David M. Davidson

SP Stc Plc: 1 patents #14 of 64Top 25%
📍 Codicote, GB: #1 of 3 inventorsTop 35%
Overall (1989): #123,528 of 140,708Top 90%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4809260 Telephone exchange John R. Bungard, Robert Gatward 1989-02-28