Gunter Frank

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Aachen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Optical interference filter
- Patent number 4,940,636
- Issue date Jul 10, 1990
- U.S. Philips Corporation
- Lieselotte Brock
- G02 - OPTICS
Information Patent Grant
Thin-film heating element
- Patent number 4,889,974
- Issue date Dec 26, 1989
- U.S. Philips Corporation
- Hans Auding
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of manufacturing a heat-reflecting filter
- Patent number 4,401,693
- Issue date Aug 30, 1983
- U.S. Philips Corporation
- Gunter Frank
- F28 - HEAT EXCHANGE IN GENERAL