Granted Patent
Utility
US 4,445,799 · App. 06/234,072
Document holders
Inventors:
David M. Wright, Albert G. Ermanski
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Feb 12, 1981
Inventors
David M. Wright
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.