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Oliver J. Whitfield
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Bow, WA, US
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last 30 patents
Information
Patent Grant
Pellet fuel burner for heating and drying systems
Patent number
5,893,358
Issue date
Apr 13, 1999
Pyro Industries, Inc.
Oliver J. Whitfield
F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information
Patent Grant
Artificial log burner
Patent number
5,655,513
Issue date
Aug 12, 1997
Pyro Industries, Inc.
Oliver J. Whitfield
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Grate with self ignitor for burning pellet fuel
Patent number
5,617,841
Issue date
Apr 8, 1997
Pyro Industries, Inc.
Oliver J. Whitfield
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Self-distributing combustion grate for pellet fueled stoves
Patent number
5,488,943
Issue date
Feb 6, 1996
Pyro Industries, Inc.
Oliver J. Whitfield
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Self concentrating combustion grate for pellet fueled stoves
Patent number
5,383,446
Issue date
Jan 24, 1995
Pyro Industries, Inc.
Oliver J. Whitfield
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Combustion grate with rods for pellet fueled stove
Patent number
5,295,474
Issue date
Mar 22, 1994
Pyro Industries, Inc.
Oliver J. Whitfield
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Combustion grate for pellet fueled stove
Patent number
5,137,010
Issue date
Aug 11, 1992
Pyro Industries, Inc.
Oliver J. Whitfield
F24 - HEATING RANGES VENTILATING