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Jacob E. Shaffer Jr.
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York, PA, US
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last 30 patents
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Patent Grant
Driving system for single phase A-C induction motor
Patent number
5,252,905
Issue date
Oct 12, 1993
York International Corporation
Frank E. Wills
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Control system for defrosting the outdoor coil of a heat pump
Patent number
4,590,771
Issue date
May 27, 1986
Borg-Warner Corporation
Jacob E. Shaffer
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information
Patent Grant
Control system for water heater with external heat source
Patent number
4,543,468
Issue date
Sep 24, 1985
Borg-Warner Corporation
Jacob E. Shaffer
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Control system for electric water heater with heat pump external he...
Patent number
4,540,874
Issue date
Sep 10, 1985
Borg-Warner Corporation
Jacob E. Shaffer
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Microcomputer control for inverter-driven heat pump
Patent number
4,364,237
Issue date
Dec 21, 1982
Borg-Warner Corporation
Kenneth W. Cooper
F24 - HEATING RANGES VENTILATING