HH

Harold W. Hannagan

ET Explosive Technology: 2 patents #2 of 3Top 70%
📍 Napa, CA: #115 of 349 inventorsTop 35%
🗺 California: #185,134 of 386,348 inventorsTop 50%
Overall (All Time): #2,342,627 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4688466 Explosive initiator and method Frank B. Burkdoll 1987-08-25
4664033 Pyrotechnic/explosive initiator Frank B. Burkdoll 1987-05-12