Kristian Bernhard Wittjen

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Teltow, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method for performing an elevator rescue run
- Patent number 7,681,693
- Issue date Mar 23, 2010
- Otis Elevator Company
- Dirk Heinrich Tegtmeier
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Electrical elevator rescue system
- Patent number 7,549,515
- Issue date Jun 23, 2009
- Otis Elevator Company
- Dirk Heinrich Tegtmeier
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
Method For Performing an Elevator Rescue Run
- Publication number 20080202859
- Publication date Aug 28, 2008
- Dirk Heinrich Tegtmeier
- B66 - HOISTING LIFTING HAULING