Columbia Gas Service Corporation

Follow

Organization

Wilmington, DE, US

Organizations

Please log in for detailed analytics

Patents Grantslast 30 patents

Information Patent Grant
Absorption refrigeration and heat pump system with defrost
- Patent number RE34747
- Issue date Oct 4, 1994
- Columbia Gas Service Corporation
- Stephen Petty
- 062 - Refrigeration
Information Patent Grant
Energy recovery system for absorption heat pumps
- Patent number RE34600
- Issue date May 10, 1994
- Columbia Gas Service Corporation
- F. Bert Cook
- 062 - Refrigeration
Information Patent Grant
Absorption refrigeration and heat pump system with defrost
- Patent number 4,972,679
- Issue date Nov 27, 1990
- Columbia Gas Service Corporation
- Stephen E. Petty
- F24 - HEATING RANGES VENTILATING