Helmuth Frenk

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Wetzlar, DT

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Patents Grantslast 30 patents

Information Patent Grant
Method of driving a two coordinate oscillator and circuit arrangeme...
- Patent number 4,056,760
- Issue date Nov 1, 1977
- Ernst Leitz G.m.b.H.
- Helmuth Frenk
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Oscillator for non-sinusoidal movements
- Patent number 4,001,658
- Issue date Jan 4, 1977
- Ernst Leitz G.m.b.H.
- Helmuth Frenk
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL