AH

Arthur J. Holbrook

R( Rolf C. Hagen (Usa): 2 patents #1 of 1Top 100%
📍 Lynnfield, MA: #2 of 8 inventorsTop 25%
🗺 Massachusetts: #114 of 1,827 inventorsTop 7%
Overall (1982): #16,135 of 81,411Top 20%
2
Patents 1982

Issued Patents 1982

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4333626 Aquarium heater 1982-06-08
4313048 Thermostatically controlled externally mounted electric aquarium heater 1982-01-26