Granted Patent
Utility
US 4,580,548 · App. 06/678,700
Gas-fired heater vent system
Inventor:
Bryan K. Ono
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Dec 6, 1984
Inventor
Bryan K. Ono
Assignee (at issue)
Teledyne Industries, 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.