Granted Patent
Utility
US 5,283,572 · App. 07/569,178
Utility meter interface circuit
Inventors:
Joseph H. McClelland, Eric A. Berns
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Aug 17, 1990
Inventors
Joseph H. McClelland
Eric A. Berns
Assignee (at issue)
Communications Instruments 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.