Douglas Hart

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Toronto, CA

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Patents Grantslast 30 patents

Information Patent Grant
System and method for building climate control
- Patent number 10,599,167
- Issue date Mar 24, 2020
- WATERSHED TECHNOLOGIES INC.
- Samuel P. van Berkel
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Luminescent concentrator light source
- Patent number 4,935,632
- Issue date Jun 19, 1990
- Landus Inc.
- Douglas Hart
- F21 - LIGHTING
Information Patent Grant
Tritium light
- Patent number 4,788,437
- Issue date Nov 29, 1988
- Landus Inc.
- Donald A. Urquhart
- F21 - LIGHTING

Patents Applicationslast 30 patents

Information Patent Application
SYSTEM AND METHOD FOR BUILDING CLIMATE CONTROL
- Publication number 20200150700
- Publication date May 14, 2020
- WATERSHED TECHNOLOGIES INC.
- Samuel P. van BERKEL
- F24 - HEATING RANGES VENTILATING
Information Patent Application
SYSTEM AND METHOD FOR BUILDING CLIMATE CONTROL
- Publication number 20180039292
- Publication date Feb 8, 2018
- WATERSHED TECHNOLOGIES INC.
- Samuel P. van BERKEL
- F24 - HEATING RANGES VENTILATING
Information Patent Application
Virtual conservation devices
- Publication number 20040122560
- Publication date Jun 24, 2004
- Douglas Hart
- G05 - CONTROLLING REGULATING