Horst Witzke

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Princeton, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Simultaneous color and bleach of ECD
- Patent number 4,257,046
- Issue date Mar 17, 1981
- Refac Electronics Corporation
- Horst Witzke
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Electrochromic cell with protective overcoat layer
- Patent number 4,120,568
- Issue date Oct 17, 1978
- Optel Corporation
- Satyendra Kumar Deb
- G02 - OPTICS
Information Patent Grant
Nonlinear electrochromic device
- Patent number 3,955,879
- Issue date May 11, 1976
- Optel Corporation
- Horst Witzke
- G02 - OPTICS