DH

Donald K. Hagar

EA Eagle Air: 1 patents #1 of 1Top 100%
📍 Allentown, PA: #8 of 65 inventorsTop 15%
🗺 Pennsylvania: #313 of 3,759 inventorsTop 9%
Overall (1989): #28,878 of 140,708Top 25%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4887958 Method and system for controlling the supply of fuel and air to a furnace — 1989-12-19
4801261 Apparatus and method for delivery of combustion air in multiple zones — 1989-01-31