John M. Ferrara

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Yardley, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Synchronous filter for VOR systems
- Patent number 4,025,923
- Issue date May 24, 1977
- Narco Scientific Industries, Inc.
- John M. Ferrara
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus for measuring the phase relation of two alternating curre...
- Patent number 4,011,503
- Issue date Mar 8, 1977
- Narco Scientific Industries, Inc.
- John M. Ferrara
- G01 - MEASURING TESTING