Granted Patent
Utility
US 5,491,540 · App. 08/363,188
Replacement part with integral memory for usage and calibration data
Inventor:
B. Mark Hirst
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Dec 22, 1994
Inventor
B. Mark Hirst
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.