RF

Ralph H. Fisher

UN Unknown: 4 patents #4,220 of 83,584Top 6%
📍 Newport News, VA: #146 of 572 inventorsTop 30%
🗺 Virginia: #9,471 of 34,511 inventorsTop 30%
Overall (All Time): #1,678,980 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4553401 Reversible cycle heating and cooling system — 1985-11-19
4493193 Reversible cycle heating and cooling system — 1985-01-15
4409796 Reversible cycle heating and cooling system — 1983-10-18