James R. Erspamer

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Phoenix, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Semi-automatic self-contained magnetic azimuth detector calibration...
- Patent number 4,143,467
- Issue date Mar 13, 1979
- Sperry Rand Corporation
- James R. Erspamer
- G01 - MEASURING TESTING
Information Patent Grant
Compensated toroidal accelerometer
- Patent number 3,992,951
- Issue date Nov 23, 1976
- Sperry Rand Corporation
- James R. Erspamer
- G01 - MEASURING TESTING
Information Patent Grant
Index error correction for flux valve heading repeater system
- Patent number 3,942,257
- Issue date Mar 9, 1976
- Sperry Rand Corporation
- James R. Erspamer
- G01 - MEASURING TESTING
Information Patent Grant
Latitude compensator for flux valve heading repeater system
- Patent number 3,939,572
- Issue date Feb 24, 1976
- Sperry Rand Corporation
- James R. Erspamer
- G01 - MEASURING TESTING
Information Patent Grant
Two-cycle compensator for flux valve heading repeater system
- Patent number 3,938,257
- Issue date Feb 17, 1976
- Sperry Rand Corporation
- James R. Erspamer
- G01 - MEASURING TESTING
Information Patent Grant
Gyroscopic stable reference device
- Patent number 3,931,747
- Issue date Jan 13, 1976
- Sperry Rand Corporation
- James R. Erspamer
- G01 - MEASURING TESTING