HF

Helmut Fröhlich

EA E.I. Du Pont De Nemours And: 1 patents #116 of 563Top 25%
📍 Oelde, DE: #2 of 18 inventorsTop 15%
Overall (1989): #106,988 of 140,708Top 80%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4806451 Process for the production of multicolor proofs using precolored toning films — 1989-02-21