Granted Patent
Utility
US 4,987,319 · App. 07/403,443
Programmable input/output circuit and programmable logic device
Inventor:
Keiichi Kawana
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Sep 6, 1989
Inventor
Keiichi Kawana
Assignee (at issue)
Kawasaki Steel 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.