Granted Patent
Utility
US 5,070,255 · App. 07/634,448
Multi-level selecting circuit
Inventor:
Yasuhiro Shin
Patented Case
View Patent ↗
Granted: Dec 3, 1991
Filed: Dec 27, 1990
Inventor
Yasuhiro Shin
Assignee (at issue)
OKI ELECTRIC INDUSTRY 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.