DC

Donald M. Caldwell

IN Intex: 1 patents #4 of 11Top 40%
📍 Bethesda, MD: #1,332 of 2,269 inventorsTop 60%
🗺 Maryland: #19,431 of 35,612 inventorsTop 55%
Overall (All Time): #3,827,427 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5223793 Apparatus for controlled rotation of a sphere or ball for inspecting or marking the surface with a predetermined pattern Roy J. Ricci, Gordon C. Oehler 1993-06-29