Granted Patent
Utility
US 4,286,641 · App. 06/093,374
Combination business card and key storage device
Inventor:
Joe Watson
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Nov 13, 1979
Inventor
Joe Watson
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.