Granted Patent
Utility
US 5,400,473 · App. 08/112,268
Foldaway window crank handle with a handle retention spring
Inventor:
Gary Delman
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Aug 27, 1993
Inventor
Gary Delman
Assignee (at issue)
Great Lakes Window 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.