Bernd Ackermann

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Berlin, DE

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Patents Grantslast 30 patents

Information Patent Grant
Control of a discontinuous current by a thyristor rectifier with in...
- Patent number 5,260,863
- Issue date Nov 9, 1993
- Otis Elevator Company
- Bernd L. Ackermann
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Adjusting technique for a digital elevator drive system
- Patent number 5,157,228
- Issue date Oct 20, 1992
- Otis Elevator Company
- Bernd L. Ackermann
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator start control technique for reduced start jerk and acceler...
- Patent number 5,076,399
- Issue date Dec 31, 1991
- Otis Elevator Company
- Herbert K. Horbruegger
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
High frequency pulse width modulation
- Patent number 4,567,411
- Issue date Jan 28, 1986
- Otis Elevator Company
- Kurt Reimann
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER