Granted Patent
Utility
US 4,430,419 · App. 06/339,414
Positive resist and method for manufacturing a pattern thereof
Inventor:
Katsuhiro Harada
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: Jan 15, 1982
Inventor
Katsuhiro Harada
Assignee (at issue)
Nippon Telegraph and Telephone Public 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.