Granted Patent
Utility
US 4,499,162 · App. 06/507,371
Photomask and method of using same
Inventors:
Edward L. Banks, Thomas S. Ellington, IV, Birol Kuyel
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Jun 24, 1983
Inventors
Edward L. Banks
Thomas S. Ellington, IV
Birol Kuyel
Assignee (at issue)
AT&T Technologies Incorporated
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.