JH

John W. Halpern

📍 Novato, CA: #1 of 23 inventorsTop 5%
🗺 California: #676 of 10,592 inventorsTop 7%
Overall (1989): #23,883 of 140,708Top 20%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4877950 Electronic purse-device 1989-10-31
4859837 Portable data carrier incorporating manually presettable processing modes 1989-08-22