John G. Gamble

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Hull, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Faulted current indicators with improved signal to noise ratios
- Patent number 5,097,202
- Issue date Mar 17, 1992
- Sigma Instruments, Inc.
- John G. Gamble
- G01 - MEASURING TESTING
Information Patent Grant
Faulted current indicators with improved signal to noise ratios
- Patent number 5,055,771
- Issue date Oct 8, 1991
- Sigma Instruments, Inc.
- John G. Gamble
- G01 - MEASURING TESTING
Information Patent Grant
Bistable toggling indicator
- Patent number 4,864,264
- Issue date Sep 5, 1989
- Sigma Instruments, Inc.
- John G. Gamble
- G08 - SIGNALLING
Information Patent Grant
Magnetically enhanced stepping motor
- Patent number 4,763,034
- Issue date Aug 9, 1988
- SIGMA Instruments, Inc.
- John G. Gamble
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric motor with magnetic enhancement
- Patent number 4,728,830
- Issue date Mar 1, 1988
- SIGMA Instruments, Inc.
- John G. Gamble
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER