Paul E. Sigafus

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Medina, 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
Flame detector using filtering of ultraviolet radiation flicker
- Patent number 6,404,342
- Issue date Jun 11, 2002
- Honeywell International Inc.
- Norman G. Planer
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Optical flame detector performance tester
- Patent number 5,236,328
- Issue date Aug 17, 1993
- Honeywell Inc.
- George J. Tate
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Infrared-based sensing circuit providing an output simulating the o...
- Patent number 5,227,639
- Issue date Jul 13, 1993
- Honeywell Inc.
- 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
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