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Patents Grantslast 30 patents

Information Patent Grant
Electrochromic element, materials for use in such element, processe...
- Patent number 5,276,547
- Issue date Jan 4, 1994
- Elf Atochem North America, Inc.
- Jean P. Couput
- G02 - OPTICS
Information Patent Grant
Electrochromic element, materials for use in such element, processe...
- Patent number 5,274,493
- Issue date Dec 28, 1993
- Elf Atochem North America, Inc.
- Jean-Paul Couput
- G02 - OPTICS