Granted Patent
Utility
US 4,956,683 · App. 07/167,780
Isolation of p-n junctions
Inventor:
Victor E. Quintana
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Mar 14, 1988
Inventor
Victor E. Quintana
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.