Granted Patent
Utility
US 5,783,989 · App. 08/396,115
Alarm sensor multiplexing
Inventors:
Darrell E. Issa, Jerry W. Birchfiled
Patented Case
View Patent ↗
Granted: Jul 21, 1998
Filed: Feb 28, 1995
Inventors
Darrell E. Issa
Jerry W. Birchfiled
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.