David Campbell

VE Verizon: 2 patents #9 of 110Top 9%

📍 San Francisco, CA: #144 of 900 inventorsTop 20%

🗺 California: #3,859 of 26,763 inventorsTop 15%

Overall (2002): #69,570 of 266,432Top 30%

Patents 2002

Issued Patents 2002

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
6490458	Portable phone bank	—	2002-12-03
6487284	Card pay telephone with speed dialing	—	2002-11-26