DJ

David Stevenson Spain, Jr.

PW Polaris Wireless: 39 patents #2 of 51Top 4%
HE Heartflow: 13 patents #14 of 49Top 30%
📍 Portland, OR: #311 of 9,213 inventorsTop 4%
🗺 Oregon: #623 of 28,073 inventorsTop 3%
Overall (All Time): #48,557 of 4,157,543Top 2%
53
Patents All Time

Issued Patents All Time

Showing 51–53 of 53 patents

Patent #TitleCo-InventorsDate
6784826 Body motion tracking system Ronald J. Kane 2004-08-31
6782265 Location determination using RF fingerprinting Luis Perez-Breva, Chee-Yee Chong, Robert Morris Dressler, Padmanabha R. Rao, Paolo Siccardo 2004-08-24
6393294 Location determination using RF fingerprinting Luis Perez-Breva, Chee-Yee Chong, Robert Morris Dressler, Padmanabha R. Rao, Paolo Siccardo 2002-05-21