Granted Patent
Utility
US 4,243,176 · App. 06/099,955
Sealing and air/fuel mixture flow metering plate for gas furnaces
Inventor:
Herbert G. Hays
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Dec 3, 1979
Inventor
Herbert G. Hays
Assignee (at issue)
Amana Refrigeration, 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.