Granted Patent
Utility
US 4,531,508 · App. 06/633,914
Gas-fired convector or convector/radiant room heating appliance
Inventors:
Jalil Niknejad, Ming-Biu Tung
Patented Case
View Patent ↗
Granted: Jul 30, 1985
Filed: Jul 24, 1984
Inventors
Jalil Niknejad
Ming-Biu Tung
Assignee (at issue)
British Gas
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.