Granted Patent
Utility
US 4,719,956 · App. 07/007,464
Adjustable window covering cord lock
Inventor:
Louis G. Valle
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Jan 28, 1987
Inventor
Louis G. Valle
Assignee (at issue)
Beatrice Companies, 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.