Helmut H. Frohlich

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Heusenstamm, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for preparation of images on tonable light-sensitive layers
- Patent number 5,292,622
- Issue date Mar 8, 1994
- E. I. Du Pont de Nemours and Company
- Bernhard Metzger
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process for the preparation of images on tonable, light-sensitive l...
- Patent number 5,210,001
- Issue date May 11, 1993
- E. I. Du Pont de Nemours and Company
- Helmut Frohlich
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process for the preparation of images on tonable, light-sensitive l...
- Patent number 5,126,226
- Issue date Jun 30, 1992
- E. I. Du Pont de Nemours and Company
- Helmut H. Frohlich
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method using compressible temporary support for transfer layer
- Patent number 4,902,363
- Issue date Feb 20, 1990
- E. I. Du Pont de Nemours and Company
- William E. Delaney
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process for the production of multicolor proofs using precolored to...
- Patent number 4,806,451
- Issue date Feb 21, 1989
- E. I. Du Pont de Nemours and Company
- Helmut H. Frohlich
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY