Granted Patent
Utility
US 5,684,717 · App. 08/615,098
Apparatus for monitoring operation of heating and cooling systems
Inventors:
Robert C. Beilfuss, Son Tran
Patented Case
View Patent ↗
Granted: Nov 4, 1997
Filed: Mar 14, 1996
Inventors
Robert C. Beilfuss
Son Tran
Assignee (at issue)
HEATCRAFT, 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.