HF

Helmut Fröhlich

EA E.I. Du Pont De Nemours And: 5 patents #1,460 of 8,010Top 20%
HO Haver & Boecker Ohg: 2 patents #7 of 42Top 20%
Basf Se: 1 patents #8,065 of 13,826Top 60%
VG Voith Sulzer Finishin Gmbh: 1 patents #22 of 36Top 65%
VG Voith Sulzer Papiertechnik Patent Gmbh: 1 patents #124 of 224Top 60%
📍 Oelde, DE: #15 of 197 inventorsTop 8%
Overall (All Time): #532,026 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
12275222 Wire mesh layer and method of making a multilayer product Stefan Butenkemper, Frank Meyer 2025-04-15
12226717 Supporting device and method of manufacturing 2025-02-18
6538135 Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6) Hans Rupert Merkle, Klaus Herbig, Erich Fretschner 2003-03-25
6406417 Device for continuously winding up longitudinally cut paper webs with rolls changed automatically at the machine speed 2002-06-18
5292622 Process for preparation of images on tonable light-sensitive layers Bernhard Metzger 1994-03-08
5210001 Process for the preparation of images on tonable, light-sensitive layers Michael Fryd 1993-05-11
5126226 Process for the preparation of images on tonable, light-sensitive layers Michael Fryd 1992-06-30
4902363 Method using compressible temporary support for transfer layer William E. Delaney 1990-02-20
4806451 Process for the production of multicolor proofs using precolored toning films 1989-02-21