Granted Patent
Utility
US 4,677,835 · App. 06/850,155
Plastic card/key combination and hinge structure
Inventor:
Robert Almblad
Patented Case
View Patent ↗
Granted: Jul 7, 1987
Filed: Apr 10, 1986
Inventor
Robert Almblad
Assignee (at issue)
Donald Almblad
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.