JG

John S. Greer

MC Mine Safety Appliances Company: 2 patents #57 of 243Top 25%
📍 Ellwood City, PA: #15 of 40 inventorsTop 40%
🗺 Pennsylvania: #30,495 of 74,527 inventorsTop 45%
Overall (All Time): #2,318,952 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5049306 Oxygen generating candles — 1991-09-17
4713182 Fire-fighting foam Ralph H. Hiltz, Joseph V. Friel 1987-12-15