Granted Patent
Utility
US 4,498,775 · App. 06/349,515
Method for detecting distance deviations to a photoresist surface in an optical printer
Inventor:
Lawrence K. White
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Feb 17, 1982
Inventor
Lawrence K. White
Assignee (at issue)
RCA 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.