James J. Duckworth

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Morris Plains, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Elevator polyphase motor control
- Patent number 4,544,873
- Issue date Oct 1, 1985
- Otis Elevator Company
- Jalal T. Salihi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Resolver to incremental shaft encoder converter
- Patent number 4,486,845
- Issue date Dec 4, 1984
- The Singer Company
- James J. Duckworth
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Dual speed resolver to digital converter with improved course-fine...
- Patent number 4,308,525
- Issue date Dec 29, 1981
- The Singer Company
- David J. Simon
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Brushless DC motor control utilizing a ROM
- Patent number 4,270,074
- Issue date May 26, 1981
- The Singer Company
- James J. Duckworth
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
High accuracy shaft angle linear DC voltage conversion using low ac...
- Patent number 4,254,369
- Issue date Mar 3, 1981
- The Singer Company
- James J. Duckworth
- G01 - MEASURING TESTING