Granted Patent
Utility
US 4,834,162 · App. 07/102,865
Vertical louver blind operating mechanism
Inventor:
Julius F. John
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Sep 30, 1987
Inventor
Julius F. John
Assignee (at issue)
Home Fashions, 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.