Manfred Stein

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Eschborn, DE

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Patents Grantslast 30 patents

Information Patent Grant
Pulse control for an electric clock
- Patent number 4,254,491
- Issue date Mar 3, 1981
- Quarz-Zeit AG
- Martin Haub
- G04 - HOROLOGY
Information Patent Grant
Electronic clock, particularly a quartz clock
- Patent number 4,176,515
- Issue date Dec 4, 1979
- Quarz-Zeit AG
- Manfred Stein
- G04 - HOROLOGY
Information Patent Grant
Protection circuit for a voltage regulator
- Patent number 4,161,759
- Issue date Jul 17, 1979
- VDO Adolf Schindling AG
- Manfred Stein
- G05 - CONTROLLING REGULATING
Information Patent Grant
Method and system for testing the accuracy of an electronic clock
- Patent number 4,142,147
- Issue date Feb 27, 1979
- Quarz-Zeit AG
- Manfred Stein
- G04 - HOROLOGY