Ralph H. Torborg

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Big Lake, 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

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