Granted Patent
Utility
US 4,498,762 · App. 06/451,394
Projection type exposure apparatus
Inventors:
Makoto Uehara, Satoru Anzai
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Dec 20, 1982
Inventors
Makoto Uehara
Satoru Anzai
Assignee (at issue)
Nippon Kogaku K.K.
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.