RL

Richard E. Ludwig

EA E.I. Du Pont De Nemours And: 2 patents #2,942 of 8,010Top 40%
📍 Newtown Square, PA: #71 of 183 inventorsTop 40%
🗺 Pennsylvania: #30,495 of 74,527 inventorsTop 45%
Overall (All Time): #2,364,984 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4310591 Security paper from film-fibril sheets Chi-Chang Lee 1982-01-12
4247318 Process for making security paper from film-fibril sheets Chi-Chang Lee 1981-01-27