Hans J. Keller

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Staefe, CH

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Patents Grantslast 30 patents

Information Patent Grant
Radiation detection method and apparatus
- Patent number 5,007,432
- Issue date Apr 16, 1991
- Eltec Instruments, Inc.
- Hans J. Keller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Catoptric differential sensing device
- Patent number 5,006,712
- Issue date Apr 9, 1991
- Eltec Instruments, Inc.
- Hans J. Keller
- G08 - SIGNALLING
Information Patent Grant
Domed segmented lens systems
- Patent number 4,930,864
- Issue date Jun 5, 1990
- Eltec Instruments, Inc.
- Walter Kuster
- G08 - SIGNALLING
Information Patent Grant
Pyroelectric sensor with high sensitivity
- Patent number 4,868,390
- Issue date Sep 19, 1989
- Eltec Instruments, Inc.
- Hans J. Keller
- G01 - MEASURING TESTING