Granted Patent
Utility
US 4,804,978 · App. 07/157,755
Exposure control system for full field photolithography using pulsed sources
Inventor:
David H. Tracy
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Feb 19, 1988
Inventor
David H. Tracy
Assignee (at issue)
PerkinElmer, Inc.
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.