James W. Ratz

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Bloomington, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Variable output heating and cooling control
- Patent number 7,293,718
- Issue date Nov 13, 2007
- Varidigm Corporation
- Paul E. Sigafus
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Variable output heating and cooling control
- Patent number 6,866,202
- Issue date Mar 15, 2005
- Varidigm Corporation
- Paul E. Sigafus
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Variable speed controller for air moving applications using an AC i...
- Patent number 6,864,659
- Issue date Mar 8, 2005
- Varidigm Corporation
- James W. Ratz
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Thermostatically operated fuel valve control circuit
- Patent number 4,789,329
- Issue date Dec 6, 1988
- Honeywell Inc.
- John E. Bohan
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES

Patents Applicationslast 30 patents

Information Patent Application
Variable output heating and cooling control
- Publication number 20050159844
- Publication date Jul 21, 2005
- Paul E. Sigafus
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Application
Variable output heating and cooling control
- Publication number 20030059730
- Publication date Mar 27, 2003
- Paul E. Sigafus
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Application
Variable speed controller for air moving applications using an AC i...
- Publication number 20030030408
- Publication date Feb 13, 2003
- James W. Ratz
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES