DR

David K. Robertson

HE Hei: 2 patents #2 of 21Top 10%
Overall (All Time): #2,348,028 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4603261 Document reading apparatus William A. Shoquist 1986-07-29
4587421 Photo-optic transducing head assembly — 1986-05-06