Granted Patent
Utility
US 5,579,993 · App. 08/369,781
HVAC distribution system identification
Inventors:
Osman Ahmed, John William Mitchell, Sanford A. Klein
Patented Case
View Patent ↗
Granted: Dec 3, 1996
Filed: Jan 6, 1995
Inventors
Osman Ahmed
John William Mitchell
Sanford A. Klein
Assignee (at issue)
Landis & Gyr Powers, 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.