Peter Walden

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Berlin, DE

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Patents Grantslast 30 patents

Information Patent Grant
Switch over from the mains supply to a frequency converter by a pha...
- Patent number 6,634,463
- Issue date Oct 21, 2003
- Otiscelecator Company
- Stefan Spannhake
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
Switch over from the mains supply to a frequency converter by a pha...
- Publication number 20020189905
- Publication date Dec 19, 2002
- Otis Elevator Company
- Stefan Spannhake
- B66 - HOISTING LIFTING HAULING