DH

David J. Helffrich

BP Bell & Howell Phillipsburg: 1 patents #2 of 4Top 50%
📍 Nazareth, PA: #2 of 18 inventorsTop 15%
🗺 Pennsylvania: #948 of 4,234 inventorsTop 25%
Overall (1994): #145,604 of 165,921Top 90%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5321624 Insertion machine having multiple document detector Randy Trach 1994-06-14