DH

Donald K. Hagar

DD Damper Design: 2 patents #1 of 2Top 50%
📍 Allentown, PA: #9 of 94 inventorsTop 10%
🗺 Pennsylvania: #357 of 4,234 inventorsTop 9%
Overall (1994): #35,210 of 165,921Top 25%
2
Patents 1994

Issued Patents 1994

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5363903 Perimeter seal for air heater 1994-11-15
5302115 Burner register assembly Lyle D. Geiger 1994-04-12