Granted Patent
Utility
US 4,875,223 · App. 07/093,974
Twisted pair adapter
Inventor:
Robert A. Curtis
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Sep 8, 1987
Inventor
Robert A. Curtis
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.