Grindheim; Earl A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Grindheim; Earl A..The latest application filed is for "parallel t impedance measurement circuit for use with variable impedance sensor".
- Grindheim; Earl A. - Richfield MN
- Grindheim; Earl A. - Minneapolis MN
| Patent | Date |
|---|---|
| Parallel T impedance measurement circuit for use with variable impedance sensor Grant 4,391,146 - Grindheim July 5, 1 | 1983-07-05 |
| Two wire current transmitter responsive to a resistive temperature sensor input signal Grant RE30,597 - Grindheim * May 5, 1 | 1981-05-05 |
| Transducer for converting a varying analog current signal to a binary digital signal Grant 4,153,873 - Grindheim May 8, 1 | 1979-05-08 |
| Two wire current transmitter responsive to a resistance sensor input signal Grant 3,906,338 - Grindheim September 16, 1 | 1975-09-16 |
| Two Wire Current Transmitter Responsive To A Resistance Sensor Input Signal Grant 3,859,594 - Grindheim January 7, 1 | 1975-01-07 |
| Two Wire Telemetry System Grant 3,680,384 - Grindheim August 1, 1 | 1972-08-01 |
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