Granted Patent
Utility
US 5,899,684 · App. 08/893,919
Power phase regulator circuit improvement, motor start switch, self-adjusting preheat and ignition trial improvement, and series-type voltage regulator improvement to hot surface ignition control for fuel oil burner
Inventors:
Hugh W. McCoy, Gregory L. Sibalich
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Jul 11, 1997
Inventors
Hugh W. McCoy
Gregory L. Sibalich
Assignee (at issue)
DESA INTERNATIONAL LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.