Donald R. Hyer

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Lynnfield, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Toxic gas monitor having automatic calibration
- Patent number 4,151,738
- Issue date May 1, 1979
- General Electric Company
- Donald R. Hyer
- G01 - MEASURING TESTING
Information Patent Grant
Frequency transducer circuit with output calibration
- Patent number 4,112,359
- Issue date Sep 5, 1978
- General Electric Company
- Donald R. Hyer
- G01 - MEASURING TESTING
Information Patent Grant
Probe assembly for an electric meter
- Patent number 4,030,030
- Issue date Jun 14, 1977
- General Electric Company
- Carl F. Van Bennekom
- G01 - MEASURING TESTING