Granted Patent
Utility
US 4,559,552 · App. 06/497,703
PIN semiconductor photoelectric conversion device with two oxide layers
Inventor:
Shunpei Yamazaki
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: May 24, 1983
Inventor
Shunpei Yamazaki
Assignee (at issue)
SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
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.