Granted Patent
Utility
US 4,553,353 · App. 06/602,386
Latch for pivotal sash window
Inventor:
Harold Simpson
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Apr 20, 1984
Inventor
Harold Simpson
Assignee (at issue)
Ashland Products, 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.