Charles H. Perkins

Person

Newtown Square, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Temperature telemetry for a settable cooking probe
- Patent number 4,089,222
- Issue date May 16, 1978
- Robertshaw Controls Company
- Charles H. Perkins
- G01 - MEASURING TESTING
Information Patent Grant
Solar heat collector system, parts therefor and methods
- Patent number 4,071,018
- Issue date Jan 31, 1978
- Robertshaw Controls Company
- Charles H. Perkins
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Reversible refrigerant system and four-way reversing valve therefor...
- Patent number 4,055,056
- Issue date Oct 25, 1977
- Robertshaw Controls Company
- Charles H. Perkins
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Motor protection circuit
- Patent number 4,042,964
- Issue date Aug 16, 1977
- Robertshaw Controls Company
- Richard K. Nurnberg
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Reversing valve construction
- Patent number 4,027,700
- Issue date Jun 7, 1977
- Robertshaw Controls Company
- Charles H. Perkins
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Multizone air conditioning system
- Patent number 3,994,335
- Issue date Nov 30, 1976
- Robertshaw Controls Company
- Charles H. Perkins
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Reversible refrigerant system and four-way reversing valve therefor...
- Patent number 3,972,347
- Issue date Aug 3, 1976
- Robertshaw Controls Company
- Charles H. Perkins
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Time variable thermostat
- Patent number 3,948,441
- Issue date Apr 6, 1976
- Robertshaw Controls Company
- Charles H. Perkins
- G05 - CONTROLLING REGULATING

Charles H. Perkins

Person

Patents Grantslast 30 patents

Temperature telemetry for a settable cooking probe

Solar heat collector system, parts therefor and methods

Reversible refrigerant system and four-way reversing valve therefor...

Motor protection circuit

Reversing valve construction

Multizone air conditioning system

Reversible refrigerant system and four-way reversing valve therefor...

Time variable thermostat