Granted Patent
Utility
US 4,569,498 · App. 06/505,605
Copy holder
Inventor:
Albert G. Ermanski
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Jun 20, 1983
Inventor
Albert G. Ermanski
Assignee (at issue)
WRIGHT LINE, LLC
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.