Sten Porrvik

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Sundsvall, SE

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Patents Grantslast 30 patents

Information Patent Grant
Toner particles for electrophotographic copying and processes for t...
- Patent number 4,923,776
- Issue date May 8, 1990
- Casco Nobel AB
- Bertil Hedvall
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Toner for electrophotographic methods and process for preparing the...
- Patent number 4,837,107
- Issue date Jun 6, 1989
- Casco Nobel AB
- Anders R. Axelsson
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner particles for electrophotographic copying and processes for t...
- Patent number 4,794,065
- Issue date Dec 27, 1988
- Casco Nobel AB
- Bertil Hedvall
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY