Wolfgang Wiedemann

Person

Geisenheim-Johannisberg, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Multilayer recording medium for optical information
- Patent number 5,151,342
- Issue date Sep 29, 1992
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G11 - INFORMATION STORAGE
Information Patent Grant
Electrophotographic recording material with mopomeril alleptor addi...
- Patent number 4,818,653
- Issue date Apr 4, 1989
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic recording material comprising a pyrazoline deri...
- Patent number 4,762,760
- Issue date Aug 9, 1988
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic recording material
- Patent number 4,725,520
- Issue date Feb 16, 1988
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Perylene tetracarboxylic acid imide pigments in an electrophotograp...
- Patent number 4,714,666
- Issue date Dec 22, 1987
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic material with pyrimido-pyridobenzimidazole comp...
- Patent number 4,666,812
- Issue date May 19, 1987
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Electrophotographic recording material containing benzimidazole der...
- Patent number 4,650,737
- Issue date Mar 17, 1987
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic recording material for printing forms
- Patent number 4,530,892
- Issue date Jul 23, 1985
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic recording material having protective layer and...
- Patent number 4,472,491
- Issue date Sep 18, 1984
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic recording material with abrasion resistant over...
- Patent number 4,390,609
- Issue date Jun 28, 1983
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Organic double layer electrophotographic recording material
- Patent number 4,315,981
- Issue date Feb 16, 1982
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic recording material with cellulose acyl ester bi...
- Patent number 4,224,395
- Issue date Sep 23, 1980
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic recording material
- Patent number 4,220,697
- Issue date Sep 2, 1980
- Hoechst Aktiengesellschaft
- Wolfgang Wiedemann
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Wolfgang Wiedemann

Person

Patents Grantslast 30 patents

Multilayer recording medium for optical information

Electrophotographic recording material with mopomeril alleptor addi...

Electrophotographic recording material comprising a pyrazoline deri...

Electrophotographic recording material

Perylene tetracarboxylic acid imide pigments in an electrophotograp...

Electrophotographic material with pyrimido-pyridobenzimidazole comp...

Electrophotographic recording material containing benzimidazole der...

Electrophotographic recording material for printing forms

Electrophotographic recording material having protective layer and...

Electrophotographic recording material with abrasion resistant over...

Organic double layer electrophotographic recording material

Electrophotographic recording material with cellulose acyl ester bi...

Electrophotographic recording material