Granted Patent
Utility
US 4,846,089 · App. 07/090,028
Hatch with releasable hinge assembly
Inventor:
Steven D. Cedergreen
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Aug 27, 1987
Inventor
Steven D. Cedergreen
Assignee (at issue)
Tempress, 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.