Lloyd A. Johnson

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Dover, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Diagnostic system for detecting faulty sensors in liquid chiller ai...
- Patent number 4,660,386
- Issue date Apr 28, 1987
- John C. Hansen
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Diagnostic system for detecting faulty sensors in a refrigeration s...
- Patent number 4,653,280
- Issue date Mar 31, 1987
- John C. Hansen
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Programmable maintenance timer system
- Patent number 4,539,632
- Issue date Sep 3, 1985
- Borg-Warner Corporation
- John C. Hansen
- G07 - CHECKING-DEVICES