Granted Patent
Utility
US 4,186,338 · App. 05/751,103
Phase change detection method of and apparatus for current-tracing the location of faults on printed circuit boards and similar systems
Inventor:
Matthew L. Fichtenbaum
Patented Case
View Patent ↗
Granted: Jan 29, 1980
Filed: Dec 16, 1976
Inventor
Matthew L. Fichtenbaum
Assignee (at issue)
Genrad, 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.