DR

Donald C. Roylance

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Potomac, MD: #596 of 998 inventorsTop 60%
🗺 Maryland: #19,431 of 35,612 inventorsTop 55%
Overall (All Time): #4,018,372 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4529976 Smoke detector with masking shield Frederick M. Jameson 1985-07-16