Granted Patent
Utility
US 4,387,145 · App. 06/306,116
Lift-off shadow mask
Inventors:
William I. Lehrer, John H. Vincak
Patented Case
View Patent ↗
Granted: Jun 7, 1983
Filed: Sep 28, 1981
Inventors
William I. Lehrer
John H. Vincak
Assignee (at issue)
Fairchild Camera & Instrument Corp.
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.