Granted Patent
Utility
US 4,859,952 · App. 07/137,928
Apparatus and method for testing impedances of interconnect devices
Inventor:
Daniel Wissell
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Dec 28, 1987
Inventor
Daniel Wissell
Assignee (at issue)
Digital Equipment Corporation
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.