Granted Patent
Utility
US 5,408,941 · App. 08/227,258
Multi oil furnace service doors
Inventors:
Emanuel S. Beiler, Benuel F. Smoker, David J. Yoder
Patented Case
View Patent ↗
Granted: Apr 25, 1995
Filed: Apr 14, 1994
Inventors
Emanuel S. Beiler
Benuel F. Smoker
David J. Yoder
Assignee (at issue)
Clean Burn, Inc.
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.