Granted Patent
Utility
US 5,329,414 · App. 07/846,868
Protective relay interface
Inventors:
Edward J. Kratt, III, David H. Quam
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Mar 6, 1992
Inventors
Edward J. Kratt, III
David H. Quam
Assignee (at issue)
RFL Electronics 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.