DH

D. Bernard Heffernan

NP National Railroad Passenger: 1 patents #31 of 48Top 65%
📍 Harleysville, PA: #217 of 322 inventorsTop 70%
🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%
Overall (All Time): #3,544,110 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6386492 Temporary sign holder David M. Brown, Nicholas J. Skoutelas 2002-05-14