Michel Defrance

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Paris, FR

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Patents Grantslast 30 patents

Information Patent Grant
Method of fabrication of non-linear control elements for a flat ele...
- Patent number 4,732,873
- Issue date Mar 22, 1988
- Thomson-CSF
- Jean N. Perbet
- G02 - OPTICS
Information Patent Grant
Electrically controlled display device
- Patent number 4,525,709
- Issue date Jun 25, 1985
- Thomson-CSF
- Michel Hareng
- G02 - OPTICS