DH

David E. Howcroft

UN Unknown: 2 patents #12,644 of 83,584Top 20%
📍 Yucaipa, CA: #39 of 120 inventorsTop 35%
🗺 California: #185,134 of 386,348 inventorsTop 50%
Overall (All Time): #2,336,415 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4787445 Hermetically sealed, relatively low pressure cooling system for internal combustion engines and method therefor — 1988-11-29
4739824 Hermetically sealed, relatively low pressure cooling system for internal combustion engines and method therefor — 1988-04-26