DB

David B. Beffa-Negrini

📍 Walpole, NH: #8 of 20 inventorsTop 40%
🗺 New Hampshire: #5,349 of 12,181 inventorsTop 45%
Overall (All Time): #2,244,832 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6164650 Board game Robert F. Wilkins, David M. Hall 2000-12-26
5810359 Board game Robert F. Wilkins, David M. Hall 1998-09-22