RO

Ralph J. Oldenkamp

📍 Oakland, CA: #8 of 64 inventorsTop 15%
🗺 California: #1,105 of 6,198 inventorsTop 20%
Overall (1982): #37,521 of 81,411Top 50%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4322613 Method for tamper-proofing magnetic stripe card reader — 1982-03-30