Granted Patent
Utility
US 5,163,850 · App. 07/800,612
Electrostatic discharge protection devices for semiconductor chip packages
Inventor:
David Cronin
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Nov 27, 1991
Inventor
David Cronin
Assignee (at issue)
Polaroid Corporation
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.