Douglas W. Smith

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Calgary, CA

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Patents Grantslast 30 patents

Information Patent Grant
Heating system for liquids
- Patent number 6,688,261
- Issue date Feb 10, 2004
- Conematic Heating Systems Inc.
- Douglas W. Smith
- F24 - HEATING RANGES VENTILATING

Patents Applicationslast 30 patents

Information Patent Application
Heating system for liquids
- Publication number 20030155430
- Publication date Aug 21, 2003
- Douglas W. Smith
- F24 - HEATING RANGES VENTILATING